00684naa#a2200229#i#450# EN\\bibl\47017 20240503204838.5 1681-1208 20040825b2004####ek#y0engy0150####ca RU The Elbrus Caldera in the Northern Caucasus: Geological structure and time of formation Journal article Moscow Geophysical Center of the Russian Academy of Sciences 2004 4 с. Journal article local Gurbanov A G Bogatikov O A Melekestsev I V Lipman P W Lowenstern J B Miller D R Dokuchaev A Ya rjes.ru