00525naa#a2200157#i#450# EN\\bibl\120431 20260426085216.7 2782-4586 20260331b2026####ek#y0engy0150####ca RU Analysis of current challenges facing small chemical enterprises in the Nizhny Novgorod Region in 2020-2026 and cost management Journal article Moscow ITBO University 2026 5 с. Journal article local Krasil'nikov Dmitriy Valer'evich jomeam.ru