Filipe Barrenho Teresa Romão Tiago Martins Nuno Correia InAuthoring environment: interfaces for creating spatial stories and gaming activities. 9 2006 conf/ACMace/2006 Advances in Computer Entertainment Technology http://doi.acm.org/10.1145/1178823.1178835 db/conf/ACMace/ace2006.html#BarrenhoRMC06