00598naa#a2200169#i#450# EN\\bibl\38427 20240920075807.5 2073-5537 20200625b2020####ek#y0engy0150####ca RU Development prospects of budget passenger air transportation market in Republic of Kazakhstan Journal article Astrakhan Astrakhan State Technical University 2020 10 с. Journal article local Экономика. Экономические науки. 33 Rublev Vladimir Vladimirovich vestnik.astu.org