1. J. Alexieva, E. Choy, E. Koycheva, Review and bibliography on generalized nets theory and applications, in: E. Choy, M. Krawczak, A. Shannon, E. Szmidt (Eds.), A Survey of Generalized Nets, Raffles KvB Monograph No. 10, 2007, pp. 207–301.
2. Evolving Intelligent Systems;Angelov,2010
3. Intuitionistic fuzzy logic as a tool for quality assessment of genetic algorithms performances;Angelova,2013
4. Generalized index matrices;Atanassov;CR Acad. Bulgare Sci.,1987
5. K. Atanassov, Two Variants of Intuitonistc Fuzzy Propositional Calculus, Preprint IM-MFAIS-5-88, Sofia, 1988.