Moscow University Mechanics Bulletin
Moscow University Mechanics Bulletin > 2016 > 71 > 4 > 93-97
Moscow University Mechanics Bulletin > 2016 > 71 > 4 > 87-92
Moscow University Mechanics Bulletin > 2016 > 71 > 4 > 98-101
Moscow University Mechanics Bulletin > 2016 > 71 > 4 > 82-86
Moscow University Mechanics Bulletin > 2016 > 71 > 4 > 77-81