ZH. O. LUKPANOVA; ZH. A. TOYZHIGITOVA; A. A. KAZHMUKHAMETOVA. INNOVATION IN ECONOMICS AND FINANCE. Academic Journal of Physical and Chemical Sciences, [S. l.], n. 3, p. 174–178., 2019. Disponível em: http://89.250.84.46/reports-science/article/view/1548. Acesso em: 16 дек. 2025.