00470naa#a2200157#i#450# EN\\bibl\24741 20260202212121.1 1609-3178 20190114b2019####ek#y0engy0150####ca RU Artwork Scientific and Technical Expertise in the Hermitage State Museum Journal article Saint-Petersburg LLC SVEN 2019 8 с. Journal article local Kosolapov Aleksandr Iosifovich zh-szf.ru