00514naa#a2200169#i#450# EN\\bibl\46849 20240901063437.7 1681-1208 20171025b2017####ek#y0engy0150####ca RU New evidence of the age of the Black Sea Pontian substage Journal article Moscow Geophysical Center of the Russian Academy of Sciences 2017 3 с. Journal article local Rybkina Alena I Rostovtseva Yuliana V rjes.ru