by A.N. Kolmogorov and S.V. Fomin ; translated from the first (1954) Russian ed. by Leo F. Boron. -- Graylock Press, 1957. -- (Elements of the theory of functions and functional analysis / by A.N. Kolmogorov and S.V. Fomin ; translated from the first (1954) Russian ed. by Leo F. Boron ; 1).