00643naa#a2200193#i#450# EN\INFRA-M\bibl\125699 20260730175229.4 2306-627X 20260615b2026####ek#y0engy0150####ca RU Principles of Investment Portfolio Construction in Crisis Conditions Journal article Moscow INFRA-M Academic Publishing LLC. 2026 9 с. Journal article local Облигации. Долговые обязательства. 336.763.3 Cheluhina Natal'ya Fedorovna Asyaeva E. A. Myagkova Yu. Yu. naukaru.ru