00601naa#a2200181#i#450# EN\\bibl\64123 20241122150357.5 2072-9502 20230428b2023####ek#y0engy0150####ca RU Heuristic assessment of service quality: case of mobile communication operators Journal article Astrakhan Astrakhan State Technical University 2023 6 с. Journal article local Эффективность. 004.051 Nikulin Vladimir Valer'evich Afonin Viktor Vasil'evich vestnik.astu.org