Vestsī\ Natsyyanalʹnaĭ\ Akadèmīī\ Navuk Belarusī. Seryya Fīzīka-Matèmatychnykh Navuk. Izvestiya Natsionalʹnoĭ\ Akademii Nauk Belarusi. Seriya Fiziko-Matematicheskikh Nauk. Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series (Vestsī\ Nats. Akad. Navuk Belarusī\ Ser. Fīz.-Mat. Navuk) (20200101), 56, no.~4, 496-503. ISSN: 1561-2430 (print).eISSN: 2524-2415.