RAZAKOVA, A.; YELPANOVA, M. .; SHOSHANOV, S. . The efficiency of outsourcing and the issues of its USE in the activities of oil and gas companies. Economic series of the Bulletin of L.N. Gumilyov ENU, [S. l.], n. 3, p. 37–45, 2023. Disponível em: https://bulecon.enu.kz/index.php/main/article/view/318. Acesso em: 22 jan. 2026.