TY JOUR TI ANALYSING UNIFICATION OF FUNCTIONS AND THEIR IMAGES IN POPULAR MOBILE MESSENGERS KW messenger KW communication KW analysis KW user KW students and school students KW functionality KW efficiency KW unification JO Ergodesign AU Stroeva, E.A. AU Paderno, P.I. PY 2022 IS 2022 PB Bryansk State Technical University