Moscow University Mechanics Bulletin
Moscow University Mechanics Bulletin > 2007 > 62 > 6 > 149-159
Moscow University Mechanics Bulletin > 2007 > 62 > 6 > 160-164
Moscow University Mechanics Bulletin > 2007 > 62 > 6 > 172-174
Moscow University Mechanics Bulletin > 2007 > 62 > 6 > 165-171