00516naa#a2200181#i#450# EN\INFRA-M\bibl\2128 20251221123803.7 1998-0744 20140417b2014####ek#y0engy0150####ca RUS RU Methodology of Training for Academic Olympics at School Journal article Moscow INFRA-M Academic Publishing LLC. 2014 11 с. Journal article local Tsvetkova Marina S. Kiryukhin V. M. zh-szf.ru