Krasnov, M. L., Makarenko, G. I., Kiselev, A. I., & Yankovsky, G. (1975). Problems and exercises in the calculus of variations. Moscow: MIR Publishers.
Παραπομπή Chicago StyleKrasnov, M. L., G. I. Makarenko, A. I. Kiselev, and George Yankovsky. Problems and Exercises in the Calculus of Variations. Moscow: MIR Publishers, 1975.
Παραπομπή MLAKrasnov, M. L., G. I. Makarenko, A. I. Kiselev, and George Yankovsky. Problems and Exercises in the Calculus of Variations. Moscow: MIR Publishers, 1975.
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