none 10.1070/RM2006v061n01ABEH004310 Steklov Mathematical Institute Steklov Mathematical Institute 2731 21698335 4167 2008091008073900 10.4213 2025-05-12T15:55:03Z 2006-06-06T11:21:09Z 0 10.4213/rm1704 Russian Mathematical Surveys Russ. Math. Surv. 0036-0279 1468-4829 02 28 2006 61 1 Vladimir I Arnol'd L R Volevich A A Gonchar S S Demidov M I Zelikin Yu S Il'yashenko G G Magaril-Il'yaev A V Mikhalev S P Novikov I V Yaschenko 02 28 2006 10 17 2007 189 192 English language version 10.4213/rm1704 10.1070/RM2006v061n01ABEH004310 2008091008073900 https://www.mathnet.ru/eng/rm1704 http://stacks.iop.org/0036-0279/61/i=1/a=M14/pdf