B. van Putten, M. Kuestner, and M. Rosjat. Proceedings of 14th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2009), Palma de Mallorca, Spain, page a.1--a.4. (2009)
J. Dooley, H. Hagras, V. Callaghan, and M. Henson. Internet of Things and Inter-cooperative Computational Technologies for Collective Intelligence, volume 460 of Studies in Computational Intelligence, Springer, Heidelberg, (2013)