VLADIMIROV, V. Ivan Mikhaylovich Tsyfra: two anniversaries îf îne years. Geofizicheskiy Zhurnal, [S. l.], v. 39, n. 5, p. 110–112, 2017. DOI: 10.24028/gzh.0203-3100.v39i5.2017.133399. Disponível em: http://journals.uran.ua/geofizicheskiy/article/view/133399. Acesso em: 3 jul. 2022.