1. On the theory of generalised dynamical systems;Barbashin;Uch. Zap. Moskov. Gos. Univ.,1949
2. Fuzzy topological spaces;Chang;J. Math. Anal. Appl.,1968
3. Topology;Choquet,1966
4. A bibliography on fuzzy sets;De Kerf;J. Computational and Appl. Math.,1975
5. Topological aspects of optimal control of dynamical polysystems;Halkin;Contributions in Differential Equations,1964