J. Minguillón, A. Tate, C. Arús, and J. Griffiths. Multiple Classifier Systems, volume 2364 of Lecture Notes in Computer Science, page 282-292. Springer, (2002)
N. Griffiths, M. Luck, and M. d'Inverno. Trust, Reputation, and Security, volume 2631 of Lecture Notes in Computer Science, page 87-107. Springer, (2002)