Vladislaw Dadayan ; translated from the ussian by Steven Smith. Abel Aganbegyan ; translated from the Russian by Helen Szamuely. Vladimir I. Arnol'd ; translated from the Russian by Roger Cooke. Vladilen Vorontsov ; [translated from the Russian by David Skvirsky]. Vladimir Maslennikov ; translated from the Russian by Gayane Chalian. Vladimir Kartashkin ; [translated from the Russian by Nancy R. Lasse]. Mark Sergeyev ; [translated from the Russian by Sergei Sumin]. Rostislav Ulyanovsky ; translated from the Russian by Nadezhda Burova. V. Maslov ; translated from the Russian by O. Volodina. Yu. I. Manin ; translated from the Russian by Neal Koblitz.