00694naa#a2200205#i#450# EN\INFRA-M\bibl\28938 /en/manage/index 20250108155120.3 2306-1731 20190606b2019####ek#y0engy0150####ca RUS RU The Role and the Place of Geometry in the System of Mathematical School Olympiads Journal article Moscow INFRA-M Academic Publishing LLC. 2019 4 с. Journal article local Статистика. Демография. Социология. 31 RUS Keldibekova Aida Oskonovna Selivanova N. S. test.editorum.ru /en/manage/index