P. Escudeiro, N. Escudeiro, M. Norberto, and J. Lopes. SGAMES, volume 176 of Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, page 117-124. Springer, (2016)
T. Brandão, T. Queluz, and A. Rodrigues. IEEE Pacific Rim Conference on Multimedia, volume 2195 of Lecture Notes in Computer Science, page 630-637. Springer, (2001)