Persons RUS  ENG    JOURNALS   PEOPLE   ORGANISATIONS   CONFERENCES   SEMINARS   VIDEO LIBRARY   PACKAGE AMSBIB     Helling, Heinz https://www.mathnet.ru/eng/person164173 List of publications on Google Scholar https://mathscinet.ams.org/mathscinet/MRAuthorID/460390 Publications in Math-Net.Ru Citations 1978 1. F. Grunewald, H. Helling, J. Mennicke, “${\rm SL}_{2}$ over complex quadratic number fields. I”, Algebra Logika, 17:5 (1978),  512–580     1