1. Yu. I. Alimov, ?On the application of Lyapunov's direct method to differential equations with multivalued right-hand sides,? Avtomat. Telemekh.,22, No. 7, 817?830 (1961).
2. B. I. Anan'ev, ?An existence theorem for a differential inclusion with variable lag,? Differents. Uravn.,11, No. 7, 1155?1158 (1975).
3. V. I. Arkin and V. L. Levin, ?Convexity of the values of vector integrals, theorems on measurable selection, and variational problems,? Usp. Mat. Nauk,27, No. 3, 21?77 (1972).
4. A. V. Arkhangel'skii, ?Bicompact sets and the topology of spaces,? Tr. Mosk. Mat. Obshch.,13, 3?55 (1965).
5. A. V. Arkhangel'skii and A. Taimanov, ?On a theorem of V. Ponomarev,? Dokl. Akad. Nauk SSSR,135, No. 2, 247?248 (1960).