Gelfand, Sergei I. Methods of homological algebra / Sergei I. Gelfand, Yuri I. Manin . - 2nd ed. . - New York : Springer, 2003 . - XX-372 p. ; 24 cm. - Springer monographs in mathematics 14397382 . Bibliogr. Index ISBN: 9783540435839 Universal Decimal Class. No.: 512.66