1. M. A. Krasnosel’skii, Translation Operator for Trajectories of Differential Equations (Nauka, Moscow, 1966) [in Russian].
2. M. A. Krasnosel’skii and P. P. Zabreiko, Geometric Methods of Nonlinear Analysis (Nauka, Moscow, 1975) [in Russian].
3. M. A. Krasnosel’skii and A. I. Perov, “On an Existence Principle for Bounded, Periodic, and Almost Periodic Solutions of Systems of Ordinary Differential Equations,” Sov. Phys. Dokl. 12(2), 235–238 (1958).
4. Yu. G. Borisovich, B. D. Gel’man, A. D. Myshkis, and V. V. Obukhovskii, Introduction to the Theory of Multi-Valued Maps and Differential Inclusions (KomKniga, Moscow, 2005) [in Russian].
5. K. Deimling, Multivalued Differential Equations (Walter de Gruyter, Berlin-New York, 1992).