00635naa#a2200169#i#450# EN\\bibl\52664 /en/manage/index 20250520071926.2 2712-7761 20220908b2022####ek#y0engy0150####ca RU Contribution of Professor A. A. Chernov to the study of karst phenomena (on the occasion of the 145th anniversary of the birth) Journal article Syktyvkar FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences" 2022 2 с. Journal article local Astakhova I. S. fht.editorum.ru /en/manage/index