Moscow University Mathematics Bulletin
Moscow University Mathematics Bulletin > 2013 > 68 > 6 > 292-294
Moscow University Mathematics Bulletin > 2013 > 68 > 6 > 270-274
Moscow University Mathematics Bulletin > 2013 > 68 > 6 > 299-302
Moscow University Mathematics Bulletin > 2013 > 68 > 6 > 275-280
Moscow University Mathematics Bulletin > 2013 > 68 > 6 > 286-291
Moscow University Mathematics Bulletin > 2013 > 68 > 6 > 307-308
Moscow University Mathematics Bulletin > 2013 > 68 > 6 > 303-306
Moscow University Mathematics Bulletin > 2013 > 68 > 6 > 263-269
Moscow University Mathematics Bulletin > 2013 > 68 > 6 > 295-298
Moscow University Mathematics Bulletin > 2013 > 68 > 6 > 281-285