00564naa#a2200169#i#450# EN\INFRA-M\bibl\113639 20260419000803.7 2500-333X 20260325b2026####ek#y0engy0150####ca RU The role of the service operator in ensuring security in the financial market Journal article Moscow INFRA-M Academic Publishing LLC. 2026 6 с. Journal article local Право. Юридические науки. 34 Tolmachev Vadim Vyacheslavovich zh-szf.ru