B. Biddle and E. Thomas, Role theory: concepts and research, 1966.

P. Chevaillier, T. Trinh, M. Barange, P. De-loor, F. Devillers et al., Semantic modeling of Virtual Environments using MASCARET, 2012 5th Workshop on Software Engineering and Architectures for Realtime Interactive Systems (SEARIS), 2012.
DOI : 10.1109/SEARIS.2012.6231174

G. Claude, . Gouranton, R. Bouville-berthelot, and B. Arnaldi, Short Paper: #SEVEN, a Sensor Effector Based Scenarios Model for Driving Collaborative Virtual Environment, ICAT-EGVE, 2014.
URL : https://hal.archives-ouvertes.fr/hal-01086237

M. Fowler, UML distilled: a brief guide to the standard object modeling language, 2004.

S. Gerbaud, N. Mollet, and B. Arnaldi, Virtual Environments for Training: From Individual Learning to Collaboration with Humanoids, Technologies for E-Learning and Digital Entertainment, 2007.
DOI : 10.1007/978-3-540-73011-8_14

URL : https://hal.archives-ouvertes.fr/inria-00165985

J. Lugrin and M. Cavazza, Making sense of virtual environments, Proceedings of the 12th international conference on Intelligent user interfaces , IUI '07, 2007.
DOI : 10.1145/1216295.1216336

M. Mateas and A. Stern, A behavior language for story-based believable agents, IEEE Intelligent Systems, vol.17, issue.4, p.17, 2002.
DOI : 10.1109/MIS.2002.1024751

E. W. Mayr, An algorithm for the general Petri net reachability problem, Proceedings of the thirteenth annual ACM symposium on Theory of computing , STOC '81, 1984.
DOI : 10.1145/800076.802477

N. Mollet, S. Gerbaud, and B. Arnaldi, Storm: a generic interaction and behavioral model for 3d objects and humanoids in a virtual environment, IPT- EGVE the 13th Eurographics Symposium on Virtual Environments, 2007.
URL : https://hal.archives-ouvertes.fr/inria-00475525

T. Murata, Petri nets: Properties, analysis and applications, Proceedings of the IEEE, 1989.
DOI : 10.1109/5.24143

D. M. Shawver, Virtual actors and avatars in a flexible user-determined-scenario environment, Proceedings of IEEE 1997 Annual International Symposium on Virtual Reality, 1997.
DOI : 10.1109/VRAIS.1997.583067

S. Smith, D. Duke, and M. Massink, The Hybrid World of Virtual Environments, Computer Graphics Forum, vol.18, issue.3, 1999.
DOI : 10.1111/1467-8659.00350

W. Swartout, R. Hill, J. Gratch, W. L. Johnson, C. Kyriakakis et al., Toward the holodeck: Integrating graphics, sound, character and story, 2006.

A. C. Vidani and L. Chittaro, Using a Task Modeling Formalism in the Design of Serious Games for Emergency Medical Procedures, 2009 Conference in Games and Virtual Worlds for Serious Applications, 2009.
DOI : 10.1109/VS-GAMES.2009.24

J. Willans and M. Harrison, Verifying the Behaviour of Virtual Environment World Objects, Interactive Systems Design, Specification, and Verification, 1946.
DOI : 10.1007/3-540-44675-3_5