1. Belson, K. (2002). “Rival to Pokémon Keeps Market Hot,” New York Times, October 6.
2. Needleman, S. E. (2018). “Videogame League Kicks Off,” Wall Street Journal, January 11.
3. “The Marvels of ‘Virtual Reality,’”;Bylinsky;Fortune,1991
4. “The Newest Addiction,”;Gunther;Fortune,1999