TY - DATA TI - American Mathematical Society translations T2 - American Mathematical Society Translations: Series 2, SN - 9781470430924 (online) KW - Number theory N1 - Includes bibliographical references; On Euler's function /; Normal periodic systems and their applications to the estimation of sums of fractional parts /; On; A. Z. Walfisz; N. M. Korobov; I. R. Safarevic; I. R. Safarevic; I. R. Safarevic; I. R. Safarevic; I. R. Safarevic; I. R. Safarevic UR - http://www.ams.org/trans2/004 ER -