Current problems in mathematics. Mathematical analysis, algebra, topology, Collection of articles. Dedicated to academician L. S. Pontryagin on the occasion of his 75th birthday, Trudy Mat. Inst. Steklov., 167, ed. S. M. Nikol'skii, A. A. Logunov, 1985, 279 ñ. http://mi.mathnet.ru/book1171
Modern problems of mathematics. Differential equations, mathematical analysis and their applications, Collection of articles. Dedicated to academician L. S. Pontryagin on the occasion of his 75th birthday, Trudy Mat. Inst. Steklov., 166, ed. S. M. Nikol'skii, A. A. Logunov, 1984, 248 ñ. http://mi.mathnet.ru/book1172
