Moscow University Physics Bulletin
Moscow University Physics Bulletin > 2018 > 73 > 6 > 612-617
Moscow University Physics Bulletin > 2018 > 73 > 6 > 579-582
Moscow University Physics Bulletin > 2018 > 73 > 6 > 599-604
Moscow University Physics Bulletin > 2018 > 73 > 6 > 612-617
Moscow University Physics Bulletin > 2018 > 73 > 6 > 579-582
Moscow University Physics Bulletin > 2018 > 73 > 6 > 599-604