00689naa#a2200205#i#4500001002200000005001700022011001400039100004100053101000800094102000700102200009200109210005100201215001000252608002700262675011300289700002500402700001800427700002400445856001400469EN\INFRA-M\bibl\3040520240703134904.3##a1998-0744##a20190924b2019####ek#y0engy0150####ca0#aRUS##aRU1#aRole of elective courses in training of mathematics in profile classeseJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2019##a3 с.##aJournal article2local##aОбразование. Воспитание. Обучение. Организация досуга. 37zRUS#1aLevandovskayagV. A.#1aAkimovgA. A.#1aSoloschenkogM. Yu.4#azh-szf.ru