Persons RUS  ENG    JOURNALS   PEOPLE   ORGANISATIONS   CONFERENCES   SEMINARS   VIDEO LIBRARY   PACKAGE AMSBIB     Sigal, E I https://www.mathnet.ru/eng/person23661 List of publications on Google Scholar https://mathscinet.ams.org/mathscinet/MRAuthorID/539468 Publications in Math-Net.Ru Citations 1971 1. I. Ts. Gokhberg, E. I. Sigal, “An operator generalization of the logarithmic residue theorem and the theorem of Rouché”, Mat. Sb. (N.S.), 84(126):4 (1971),  607–629      ; Math. USSR-Sb., 13:4 (1971), 603–625 181