00592naa#a2200181#i#450# EN\\bibl\127159 20260722000145.3 2073-5537 20260713b2026####ek#y0engy0150####ca RU The competitiveness of sanitary products: key and determining factors Journal article Astrakhan Astrakhan State Technical University 2026 9 с. Journal article local Конкуренция. 339.137.2 Sheremetyeva Elena Nikolaevna Surkina Maria Stanislavovna vestnik.astu.org