P. Bertinetto and . Marco, Il verbo, 1991.

P. Bertinetto and . Marco, Il dominio tempo-aspettuale. Demarcazioni, intersezioni,contrasti, 1997.

K. Boye, Evidentiality and scope

C. , C. &. Babiniotis, and . Georgios, Ghrammatikí tis Néas Ellinikís The Verb, II. To Ríma, 1999.

D. , J. Karolak, S. , V. Koseska-toszewa, and J. , Quelques concepts relatifs au temps et à l'aspect pour l'analyse des textes, Studia kognitywe Sémantique des catégories d'aspect et de temps [Études cognitives Semantyka kategorii aspecktu i czasu] Warsaw: Slawistyczny Os'rodek Wyd, pp.57-88, 1994.

D. and J. Guentcheva, Is the Notion of Process Necessary?, 1995.

K. Hengeveld, Layers and operators in Functional Grammar, Journal of Linguistics, vol.25, pp.127-157, 1989.
DOI : 10.1515/9783110901191.1

H. , D. Mackridge, P. &. Philippaki-warburton, and I. , Greek: A Comprehensive Grammar of the Modern Language, Nouns and Verbs, pp.53-94, 1987.

L. Geofrey and J. Svartvik, A Communicative Grammar of English, 1981.

P. and F. Robert, Mood and Modality, The Progressive in English: Events, States and Processes, pp.2-213, 1986.

M. Squartini, Disentangling evidentiality and epistemic modality in Romance, Lingua, vol.114, issue.7, pp.873-895, 2004.
DOI : 10.1016/S0024-3841(03)00064-0

T. and E. Closs, The concepts of constructional mismatch and type-shifting from the perspective of grammaticalization, Cognitive Linguistics, pp.523-557, 2007.

Z. Vendler, Linguistics in Philosophy, 1967.

F. Vlach, Temporal Adverbs, Tenses and The Perfect, Linguistics and Philosophy, pp.231-283, 1981.