D. Reina, S. Toral, F. Barrero, N. Bessis, and E. Asimakopoulou. Internet of Things and Inter-cooperative Computational Technologies for Collective Intelligence, volume 460 of Studies in Computational Intelligence, Springer, Heidelberg, (2013)
N. Galaske, D. Strang, and R. Anderl. Proceedings of the World Congress on Engineering and Computer Science (WCECS 2015), San Francisco, USA, Volume II, volume 2220 of Lecture Notes in Engineering and Computer Science, page 1035--1040. Hong Kong, International Association of Engineers (IAENG), Newswood, (2015)