Media type: E-Article Title: ALEKSANDR DANILOVICH ALEKSANDROV (on his fiftieth birthday) Contributor: Efimov, N V; Zalgaller, V A; Pogorelov, A V imprint: Steklov Mathematical Institute, 1962 Published in: Russian Mathematical Surveys Language: Not determined DOI: 10.1070/rm1962v017n06abeh001131 ISSN: 0036-0279; 1468-4829 Keywords: General Mathematics Origination: Footnote: Access State: Open Access