00567naa#a2200181#i#450# EN\INFRA-M\bibl\51097 20260520142837.3 2308-4898 20220629b2022####ek#y0engy0150####ca RU To the Question of the Classification for Analytical Surfaces Journal article Moscow INFRA-M Academic Publishing LLC. 2022 7 с. Journal article local Математика. 51 Strashnov Stanislav Viktorovich Rynkovskaya Marina Igorevna zh-szf.ru