00518naa#a2200157#i#450# EN\\bibl\131054 20260730182824.4 2782-4586 20260731b2026####ek#y0engy0150####ca RU Mathematical model of bus fleet resource optimization in urban logistics conditions: balance of redundancy and efficiency Journal article Moscow ITBO University 2026 8 с. Journal article local Kiryushin Sergey Aleksandrovich jomeam.ru