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  1. ^ Broll, W.; Ohlenburg, J.; Lindt, I.; Herbst, I.; Braun, A. K. Meeting technology challenges of pervasive augmented reality games. Proceedings of 5th ACM SIGCOMM workshop on Network and system support for games - NetGames '06. 2006: 28. ISBN 1595935894. doi:10.1145/1230040.1230097. 
  2. ^ Richmond, Riva. Three Best Ways to Use Location-Based Social Media. The Wall Street Journal. Dow Jones & Company, Inc. September 10, 2010 [September 30, 2010]. (原始内容存档于2020-07-27).