00621naa#a2200181#i#450# EN\\bibl\45810 20241011002501.5 2658-4026 20211004b2021####ek#y0engy0150####ca RU Specificity of using messengers by schoolchildren and students in mobile learning Journal article Bryansk Bryansk State Technical University 2021 7 с. Journal article local Экономика. Экономические науки. 33 Paderno Pavel Iosifovich Stroeva Elizaveta Arkadyevna bstu.editorum.ru