1. P. Milgram, F. Kishino, “A taxonomy of mixed reality visual displays,” IEICE Transactions on Information Systems, E77-D(12), p.1321, 1994.
2. ‘Alter Ego’: FOX gives first look at world’s 1st avatar singing competition, https://www.fox2detroit.com/news/alter-ego-fox-gives-firstlook-at-worlds-1st-avatar-singing-competition (accessed on June 7, 2023)
3. John-legend Virtual Concert, https://www.xsens.com/blog/virtualjohn-legend-powered-by-xsens (accessed on June 9, 2023)
4. ABBA Concert, https://abbavoyage.com/ (accessed on June 11, 2023)
5. MBC VR Human Documentary, https://program.imbc.com/meetyou/ (accessed on June 11, 2023)