2011 · Filipe Portela, Marta Vilas-Boas, et al. · Lecture notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering · 8
2009 · Manuel Filipe Santos, Filipe Portela, et al. · Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) · 8
2010 · Marta Vilas Boas, Manuel Filpe Santos, et al. · Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) · 4