J. Bertin, Sémiologie graphique, 1973.

E. W. Dijkstra, A note on two problems in connexion with graphs, Numerische Mathematik, vol.4, issue.1, pp.269-271, 1959.
DOI : 10.1007/BF01386390

J. Itten and . Wiley, The Art of Color, 1997.

A. Küpper, Location-Based Services: Fundamentals and Operation, 2005.
DOI : 10.1002/0470092335

G. Rossi, S. Gordillo, C. Challiol, and A. Fortier, Context-Aware Services for Physical Hypermedia Applications " . OTM Workshops, Proceedings, Part II. Lecture Notes in Computer Science 4278 Springer, pp.1914-1923, 2006.
DOI : 10.1007/11915072_99
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.86.7721

J. Schiller and A. Voisard, Location-Based Services, 2004.

N. Wang, PHOTOWAY, Describing itineraries by pictures with arrows in pervasive systems, Master Dissertation in Computing, 2007.

F. B. Zhan, Three Fastest Shortest Path Algorithms on Real Road Networks, Journal of Geographic Information and Decision Analysis, vol.1, issue.1, pp.69-82, 1997.
DOI : 10.1287/trsc.32.1.65
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.111.5738