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)
Y. Körber, V. Hahn, M. Moniri, T. Schwartz, and M. Feld. Proceedings of the 13th IEEE International Conference on Intelligent Environments (IE '17), Seoul, South Korea, page 184--187. Los Alamitos, CA, IEEE Computer Society, (2017)