1. Dynamics of collective behavior. III. Heterogenic systems;Opoitsev;Avtom. Telemekhanika,1975
2. Generalization of the theory of monotone and concave operators;Opoitsev;Tr. Mosk. Mat. Obs.,1978
3. Opoitsev, V.I., and Khurodze, T.A. (1984). Nonlinear operators in spaces with a cone. Tbilis. Gos. Univ. Tbilisi, 271.
4. Opoitsev, V.I. (1986). Nonlinear Systemostatics, Nauka. Library of Mathematical Economics.
5. Coupled fixed points of nonlinear operators with applications;Guo;Nonlinear Anal.,1987