[1] C. Whitbeck,“Virtual Environments: Ethical Issues and Significant Confusions.”Presence, Vol. 2, No. 2, pp. 147-152 (1993).
[2]Cruz-Neira C,“Virtual reality overview,” no SIGGRAPH 93 Conferência internacional de gráficos computacionais e técnicas interativas, Orange County Convention Center, Orlando, (1993).
[3]E. Kallman, “My Anxieties about Virtual Environments”. Presence, Vol. 2, No. 2,
pp. 141-142 (1993)
[4]Fuchs H, Bishop G, “Research Directions in Virtual Environments “ Chapel Hill, NC: University of North Carolina at Chapel Hill. (1992)
[5]Gigante M. A., “Virtual reality: definitions, history and applications.Virtual Real. Syst.”(1993)
[6]L. J. Whalley: “ Ethical Issues in the Application of Virtual Reality to the Treatment
of Mental Disorders “ “Virtual Reality Systems”, Academic-Press, pp. 273-287 (1993)
[7]Slater M , “Place illusion and plausibility can lead to realistic behaviour in immersive virtual environments” (1993)
[8]Slater M, Sanchez-Vives M. V, “Enhancing our lives with immersive virtual reality “ (2016).
[9] Sutherland I. E, “The Ultimate Display. Multimedia: From Wagner to Virtual Reality” New York (1965).
[10]Sutherland I. E. (1968). “A head-mounted three dimensional display,” , 1968, Fall Joint Computer Conference, Part I (1965).
[11]T. Sheridan, “ My Anxieties about Virtual Environments “ Presence, Vol. 2, No. 2,
pp. 141-142 (1993)
[12]Sharmistha Mandal, “Brief Introduction of Virtual Reality & its Challenges”
International Journal of Scientific & Engineering Research, Volume 4, Issue 4, April-2013 Avaible:https://www.ijser.org/researchpaper/Brief-Introduction-of-Virtual-Reality-its-Challenges.pdf
[13]Moses Onyesolu, Felista Eze, “Understanding Virtual Reality Technology:Advances and Applications” (2011).Avaible:https://www.researchgate.net/publication/221911335_Understanding_Virtual_Reality_Technology_Advances_and_Applications
[14]Tomasz Mazuryk, Michael Gervautz, “ Virtual Reality, History, Applications,Technology and Future” Vienna University of Technology, Austria. Avaible:https://www.researchgate.net/publication/2617390_Virtual_Reality_-_History_Applications_Technology_and_Future