Y. S. Oladyshkin, N.N. Bobkov, and O. Kozyrev. page 13. N. Novgorod, Russia, The 3 international scientific-practical conference on graphic information technologies and systems (COGRAPH), (2001)
Y. S. Oladyshkin, N.N. Bobkov, and O. Kozyrev. page 15. Ekaterinburg, Russia, 3 All-Russian congress on theoretical and applied mechanics. Ural department of Russian Academy of Sciences, (2001)