Postnikov Mikhail Mikhailovich

Books in Math-Net.Ru

1. M. M. Postnikov, Investigations in homotopy theory of continuous mappings. I. The algebraic theory of systems. II. The natural system and homotopy type, Trudy Mat. Inst. Steklov., 46, 1955, 160 с.
   http://mi.mathnet.ru/book1083