1. S. G. Krein and Yu. I. Petunin, ?Scales of Banach spaces, ? Usp. Matem. Nauk,21, No. 2 (128) (1966).
2. M. A. Krasnosel'skii and Ya. B. Rutitskii, Convex Functions and Orlicz Spaces fin Russian], Fizmatgiz, Moscow (1958).
3. Ya. B. Rutitskii, ?Scales of Orlicz spaces and interpolation theorems, ? in: Proceedings of a Seminar on Functional Analysis [in Russian], No. 7, Voronezh (1963).
4. Ya. B. Rutitskii, ?Some remarks on the theory of scales of Orlicz spaces, ? in: Proceedings of a Seminar on Functional Analysis [in Russian], No. 10, Voronezh (1968).
5. L. V. Kantorovich and G. P. Akilov, Functional Analysis in Normed Spaces [in Russian], Fizmatgiz, Moscow (1959).