00554naa#a2200169#i#450# EN\\bibl\11813 20240505152049.7 1999-5644 20160615b2016####ek#y0engy0150####ca RUS RU Role of social environment factors in the teaching of mathematics in the process of psycho-pedagogical support Journal article CHERKIZOVO Russian State University of Tourism and Service 2016 8 с. Journal article local Aniskina Marfa rguts.editorum.ru