A. Wang, Z. Li, M. Zhou, and A. Al-Ahmari. Systems, Man, and Cybernetics, Part C: Applications and Reviews, IEEE Transactions on, 42 (6):
1204--1218(November 2012)
L. Piroddi, R. Cordone, and I. Fumagalli. IEEE Transactions on Systems, Man, and Cybernetics - Part A: Systems and Humans, 38 (6):
1337--1348(November 2008)