TY JOUR TI SYSTEM OF CRITERIA OF EVALUATION OF QUALITY OF TELECOMMUNICATION SERVICES AND METHOD OF THEIR EVALUATION KW criteria of quality KW set-theoretical model KW quality of services KW set of criteria KW set of assessments KW Pospelov’s matrix KW telecommunication service JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Pham, Q.. AU Kvyatkovskaya, I.. PY 2013 IS 2013 PB Astrakhan State Technical University