1. Quasidifferential Calculus
2. Demyanov, V.F., Polyakova, L.N. and Rubinov, A.M. 1979. On a generalization of the concept of subdifferential. All-Union Conference on Dynamic Control: Abstracts of Reports. 1979, Sverdlovsk. pp.79–84. in Russian
3. Quasidifferential Calculus