00475naa#a2200157#i#450# EN\\bibl\117351 20260324223908.2 2542-1840 20260319b2026####ek#y0engy0150####ca RU Private Law Aspects of Metaverses: The Case of Marketplaces Journal article Kemerovo Kemerovo State University 2026 11 с. Journal article local Aksenov Vadim Arkad'evich vestnik-bees.kemsu.ru