D. Morand, I. Garcia, and P. Lalanda. Proceedings of the 16th IEEE International Conference on Emerging Technologies and Factory Automation (EFTA 2011), Toulouse, France, page a.1--a.8. (2011)
L. Chen, J. Hoey, C. Nugent, D. Cook, and Z. Yu. IEEE Transactions on Systems, Man, and Cybernetics, Part C: Applications and Reviews, 42 (6):
790-808(November 2012)