KHALYAVIN, O.; KHALYAVINA, L. Ballistic Gravimeter of the Poltava Gravimetric Observatory. History of Creation and Modernization. Geofizicheskiy Zhurnal, [S. l.], v. 48, n. 3, 2026. DOI: 10.24028/gj.v48i3.356209. Disponível em: https://journals.uran.ua/geofizicheskiy/article/view/356209. Acesso em: 27 jun. 2026.