M. Argyle and M. Cook, Gaze and Mutual Gaze, 1976.

G. Bailly, S. Raidt, and F. Elisei, Gaze, conversational agents and face-to-face communication, Speech Communication, vol.52, issue.6, pp.598-612, 2010.
DOI : 10.1016/j.specom.2010.02.015
URL : https://hal.archives-ouvertes.fr/hal-00480335

A. L. Berez, Eudico linguistic annotator (Elan), Lang. Document. Conserv, vol.1, pp.283-289, 2007.

P. Boersma and D. Weenink, Praat: Doing Phonetics by Computer (Version 5.1.08) (Computer Program) Available at: http://www.praat.org, 2007.

J. Boucher, J. Ventre-dominey, S. Fagel, G. Bailly, and P. F. Dominey, Facilitative effects of communicative gaze and speech in human-robot cooperation, Proceedings of the 3rd international workshop on Affective interaction in natural environments, AFFINE '10, pp.71-74, 2010.
DOI : 10.1145/1877826.1877845
URL : https://hal.archives-ouvertes.fr/hal-00531002

P. Bull and G. Connelly, Body movement and emphasis in speech, Journal of Nonverbal Behavior, vol.79, issue.3, 1985.
DOI : 10.1007/BF01000738

A. J. Calder, J. D. Beaver, J. S. Winston, R. J. Dolan, R. Jenkins et al., Separate coding of different gaze directions in the superior temporal sulcus and inferior parietal lobule Circumscribing referential domains during realtime language comprehension, Curr. Biol. J. Mem. Lang, vol.17, issue.47, pp.30-49, 2002.

T. Chaminade and G. Cheng, Social cognitive neuroscience and humanoid robotics, Journal of Physiology-Paris, vol.103, issue.3-5, pp.286-295, 2009.
DOI : 10.1016/j.jphysparis.2009.08.011

G. Collier, Emotional Expression, Hillsdale: Lawrence Erlbaum, 1985.

B. De-gelder, Towards the neurobiology of emotional body language, Nature Reviews Neuroscience, vol.9, issue.3, pp.242-249, 2006.
DOI : 10.1038/nrn1872

B. De-gelder, Why bodies? Twelve reasons for including bodily expressions in affective neuroscience, Philosophical Transactions of the Royal Society B: Biological Sciences, vol.40, issue.9, pp.3475-3484, 2009.
DOI : 10.1016/j.biopsych.2005.01.028

P. F. Dominey and F. Warneken, The basis of shared intentions in human and robot cognition, New Ideas in Psychology, vol.29, issue.3, pp.260-274, 2011.
DOI : 10.1016/j.newideapsych.2009.07.006

S. Fagel, G. Bailly, F. Elisei, and A. Lelong, On the importance of eye gaze in a face-to-face collaborative task, Proceedings of the 3rd international workshop on Affective interaction in natural environments, AFFINE '10, pp.81-85, 2010.
DOI : 10.1145/1877826.1877847
URL : https://hal.archives-ouvertes.fr/hal-00531001

H. H. Goossens, V. Opstal, and A. J. , Human eye-head coordination in two dimensions under different sensorimotor conditions, Experimental Brain Research, vol.114, issue.3, pp.542-560, 1997.
DOI : 10.1007/PL00005663

U. Hadar, T. J. Steiner, E. C. Grant, R. , and F. C. , Kinematics of head movements accompanying speech during conversation, Human Movement Science, vol.2, issue.1-2, pp.35-46, 1983.
DOI : 10.1016/0167-9457(83)90004-0

J. Hanna and S. Brennan, Speakers??? eye gaze disambiguates referring expressions early during face-to-face conversation, Journal of Memory and Language, vol.57, issue.4, pp.596-615, 2007.
DOI : 10.1016/j.jml.2007.01.008

D. Heylen, HEAD GESTURES, GAZE AND THE PRINCIPLES OF CONVERSATIONAL STRUCTURE, International Journal of Humanoid Robotics, vol.03, issue.03, pp.241-267, 2006.
DOI : 10.1142/S0219843606000746

M. Hudson, C. H. Liu, and T. Jellema, Anticipating intentional actions: The effect of eye gaze direction on the judgment of head rotation, Cognition, vol.112, issue.3, pp.423-434, 2009.
DOI : 10.1016/j.cognition.2009.06.011

K. Ito and S. R. Speer, Immediate effects of intonational prominence in a visual search task, Proceedings of Speech Prosody, pp.261-264, 2006.

J. Jonides, Voluntary versus automatic control over the mind's eye's movement, Attention and Performance IXHillsdale: Erlbaum), pp.187-203, 1981.

A. Kendon, Some functions of gaze-direction in social interaction, Acta Psychologica, vol.26, pp.22-63, 1967.
DOI : 10.1016/0001-6918(67)90005-4

A. Kendon, Gesture and Speech: How they Interact, pp.13-45, 1983.

S. Lallee, S. Lemaignan, A. Lenz, C. Melhuish, L. Natale et al., Towards a platform-independent cooperative human-robot interaction system: I. Perception, 2010 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2010.
DOI : 10.1109/IROS.2010.5652697

S. Lallee, C. Madden, M. Hoen, and P. F. Dominey, Linking language with embodied and teleological representations of action for humanoid cognition, Frontiers in Neurorobotics, 2010.
DOI : 10.3389/fnbot.2010.00008

S. R. Langton, R. J. Watt, and V. Bruce, Do the eyes have it? Cues to the direction of social attention, Trends in Cognitive Sciences, vol.4, issue.2, pp.50-59, 2000.
DOI : 10.1016/S1364-6613(99)01436-9

S. R. Langton and V. Bruce, Reflexive Visual Orienting in Response to the Social Attention of Others, Visual Cognition, vol.55, issue.5, pp.541-567, 1999.
DOI : 10.1037/h0027474

J. Lee, S. Marsella, D. Traum, and J. Gratch, The Rickel Gaze Model: A Window on the Mind of a Virtual Human, Proceedings of the 7th International Conference on Intelligent Virtual Agents (IVA-2007). Lecture Notes in Computer Science, pp.296-303, 2007.
DOI : 10.1007/978-3-540-74997-4_27

F. Maricchiolo, M. Bonaiuto, and A. Gnisci, Hand gestures in speech: studies of their roles in social interaction, Proceedings of Frontiers in Neurorobotics www.frontiersin.org the Conference of the International Society for Gesture Studies, 2005.

E. Mcclave, Linguistic functions of head movements in the context of speech, Journal of Pragmatics, vol.32, issue.7, pp.855-878, 2000.
DOI : 10.1016/S0378-2166(99)00079-X

H. K. Meeren, C. C. Van-heijnsbergen, and B. De-gelder, Rapid perceptual integration of facial expression and emotional body language, Proceedings of the National Academy of Sciences, vol.102, issue.45, pp.16518-16523, 2005.
DOI : 10.1073/pnas.0507650102

M. B. Neider, X. Chen, C. A. Dickinson, S. E. Brennan, and G. J. Zelinsky, Coordinating spatial referencing using shared gaze, Psychonomic Bulletin & Review, vol.3, issue.3, pp.718-724, 2010.
DOI : 10.1075/pc.3.2.02vel

U. Pattacini, Modular Cartesian Controllers for Humanoid Robots: Design and Implementation on the iCub, 2010.

C. Pelachaud, N. I. Badler, and M. Steedman, Generating Facial Expressions for Speech, Cognitive Science, vol.24, issue.4, p.146, 1996.
DOI : 10.1207/s15516709cog2001_1
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.102.7035

D. Perrett, J. Hietanen, M. Oram, P. Benson, and E. Rolls, Organization and Functions of Cells Responsive to Faces in the Temporal Cortex [and Discussion], Philosophical Transactions of the Royal Society B: Biological Sciences, vol.335, issue.1273, pp.23-30, 1992.
DOI : 10.1098/rstb.1992.0003

A. Puce, T. Allison, S. Bentin, J. C. Gore, and G. Mccarthy, Temporal cortex activation in humans viewing eye and mouth movements, 1998.

P. Ricciardelli, E. Betta, S. Pruner, and M. Turatto, Is there a direct link between gaze perception and joint attention behaviours? Effects of gaze contrast polarity on oculomotor behaviour, Experimental Brain Research, vol.8, issue.3, pp.347-357, 2009.
DOI : 10.1007/s00221-009-1706-8

P. Ricciardelli, C. Bonfiglioli, C. Iani, S. Rubichi, and R. Nicoletti, Spatial coding and central patterns: Is there something special about the eyes?, Canadian Journal of Experimental Psychology/Revue canadienne de psychologie exp??rimentale, vol.61, issue.2, pp.79-90, 2007.
DOI : 10.1037/cep2007_2_79

P. Ricciardelli, E. Bricolo, S. M. Aglioti, C. , and L. , My eyes want to look where your eyes are looking: Exploring the tendency to imitate another individual??s gaze, NeuroReport, vol.13, issue.17, pp.2259-2264, 2002.
DOI : 10.1097/00001756-200212030-00018

P. Ricciardelli and J. Driver, Effects of head orientation on gaze perception: How positive congruency effects can be reversed, The Quarterly Journal of Experimental Psychology, vol.61, issue.3, pp.491-504, 2008.
DOI : 10.1080/17470210701255457

D. D. Salvucci and J. H. Goldberg, Identifying fixations and saccades in eye-tracking protocols, Proceedings of the symposium on Eye tracking research & applications , ETRA '00, pp.71-78, 2000.
DOI : 10.1145/355017.355028

C. Sidner, C. Lee, C. Kidd, N. Lesh, R. et al., Explorations in engagement for humans and robots, Artificial Intelligence, vol.166, issue.1-2, pp.140-164, 2005.
DOI : 10.1016/j.artint.2005.03.005

M. Staudte and M. Crocker, Visual attention in spoken HRI, HRI '09, 2009.

M. Tomasello, Origins of Human Communication, 2008.

M. Tomasello, M. Carpenter, J. Call, T. Behne, M. et al., Understanding and sharing intentions: The origins of cultural cognition, Behavioral and Brain Sciences, vol.28, issue.05, pp.675-691, 2005.
DOI : 10.1017/S0140525X05000129

W. A. Van-de-riet, J. Grezes, and B. De-gelder, Specific and common brain regions involved in the perception of faces and bodies and the representation of their emotional expressions, Social Neuroscience, vol.18, issue.2, pp.101-120, 2009.
DOI : 10.1016/0028-3932(95)00062-3

F. Warneken, F. Chen, and M. Tomasello, Cooperative Activities in Young Children and Chimpanzees, Child Development, vol.14, issue.1, pp.640-663, 2006.
DOI : 10.1017/S0140525X05000129

A. Wätcher and L. T. Biegler, On the implementation of a primaldual interior point filter line search algorithm for large-scale nonlinear programming, Math. Program, vol.106, pp.25-57, 2006.