00758naa#a2200193#i#450# EN\\bibl\125673 20260612044755.5 2949-2440 20260611b2026####ek#y0engy0150####ca RU Geostructural characteristics of the Astrakhan-Kalmyk part of the Caspian basin in the light of recent scientific research Journal article Astrakhan Astrakhan State Technical University 2026 8 с. Journal article local Месторождения углеродистых пород и углеводородов. 553.9 Duvanova Maria Evgen'evna Golchikova Nadezhda Nikolayevna Duvanov Alexandr Viktorovich vestnik.astu.org