Intelligent Systems'2014 Proceedings of the 7th IEEE International Conference Intelligent Systems IS’2014, September 24‐26, 2014, Warsaw, Poland, Volume 1: Mathematical Foundations, Theory, Analyses - Angelov, P.; Atanassov, K.T; Doukovska, L.; Hadjiski, M.; Jotsov, V.; Kacprzyk, J.; Kasabov, N.; Sotirov, S.; Szmidt, E.; Zadrożny, S. (Springer International Publishing : Imprint: Springer, 2015)