00628naa#a2200193#i#450# EN\\bibl\49155 20241123221049.6 1681-1208 20220418b2022####ek#y0engy0150####ca RUS RU Geological factors and mechanism of sinkhole development in Cho Don zinc-lead mining area, Bac Kan province, North of Vietnam Journal article Moscow Geophysical Center of the Russian Academy of Sciences 2022 17 с. Journal article local Van Hoang Nguyen Quoc Cuong Tran Kasatkin S. rjes.ru