00618naa#a2200193#i#450# EN\\bibl\55617 20241201065957.7 2542-1840 20221212b2022####ek#y0engy0150####ca RU Attention Development in Elementary School Children: Psychological and Social Factors Journal article Kemerovo Kemerovo State University 2022 5 с. Journal article local Grogoleva Ol'ga Yur'evna Belogai Ksenia N. Borisenko Julia Vyacheslavovna Simkin Mikhail L. jstrategizing.kemsu.ru