1. M. A. Krasnosel'skii, Topological Methods in the Theory of Nonlinear Integral Equations [in Russian], Gostekhizdat, Moscow (1956).
2. M. A. Krasnosel'skii, P. P. Zabreiko, E. I. Pustyl'nik, and P. E. Sobolevskii, Integral Operators in Spaces of Summable Functions [in Russian], Nauka, Moscow (1966).
3. Ya. B. Rutitskii, ?A generalization of Orlich coordinate spaces,? Nauch. Tr. Voronezh. Inzh.-Stroit. Inst., 271?286 (1952).
4. P. P. Zabreiko and A. I. Povolotskii, ?On the theory of Hammerstein equations,? Ukr. Mat. Zh.,22, No. 2, 271?286 (1970).
5. M. A. Krasnosel'skii and Ya. B. Rutitskii, Convex Functions and Orlich Spaces [in Russian], Fizmatgiz, Moscow (1958).