00520naa#a2200181#i#450# EN\\bibl\98442 20250828135316.4 3034-4689 20250801b2025####ek#y0engy0150####ca RU MATHEMATICAL MODELING OF MASS SERVICE SYSTEMS FOR APPLICATIONS WITH LIMITED LIFETIME Journal article Kazan Kazan National Research Technological University 2025 4 с. Journal article local vestniktu.ru