GPS and Google Earth for Development: How to create, share and collaborate with maps on the net: Arnalich, Santiago, Urruela, Julio, Fortin, Maxim: 9788461602353: Amazon.com: Books
architecture - How to achieve an GPS-Based game like "Parallel Kingdom" - Game Development Stack Exchange
Kids' GPS game brings new fun adventures to Legoland Resort
Encyclopedia of location based games (or GPS-games) | Das Box
Ghost scan [ghost discovery AR & GPS game] – Apps on Google Play
Practical advice for city hunt- GPS accuracy in urban gaming : Loquiz
Android Apps by Build GPS based RPG Games on Google Play