00551naa#a2200193#i#450# EN\INFRA-M\bibl\75876 20250412050423.6 2308-4898 20231225b2023####ek#y0engy0150####ca RU About Student Research Work Journal article Moscow INFRA-M Academic Publishing LLC. 2023 14 с. Journal article local Геометрия. 514 Boykov A. A. Efremov A. V. Rustamyan Vyacheslav Volodyaevich zh-szf.ru