A. Wang, Z. Li, M. Zhou, и A. Al-Ahmari. Systems, Man, and Cybernetics, Part C: Applications and Reviews, IEEE Transactions on, 42 (6):
1204--1218(ноября 2012)
T. Asaftei. Buletinul Institutului Politehnic DIN Iasi published by Gheorghe Asachi Technical University of Iasi Automatic Control and Computer Science Section, (2012)