none 10.1070/RM1982v037n01ABEH003198 Steklov Mathematical Institute Steklov Mathematical Institute 2731 18585309 4167 2008091008073900 10.4213 2024-10-03T12:50:08Z 2005-11-08T13:27:14Z 0 Russian Mathematical Surveys Russ. Math. Surv. 0036-0279 1468-4829 02 28 1982 37 1 In memory of Lazar Aronovich Lyusternik P S Aleksandrov 02 28 1982 10 16 2007 145 147 10.1070/RM1982v037n01ABEH003198 2008091008073900 https://www.mathnet.ru/eng/rm3465