Dr. Edson P. Pfützenreuter. 

This paper put in discussion some aspects of the Location Based Mobile Games, Comparing the simultaneous reality that this kind of game afford, with the concepts of parallel worlds and parallel realities, which come from physics and literature.

http://www.lbd.dcc.ufmg.br/colecoes/sbgames/2006/037.pdf

Processando consulta.