Kulakova, Natalya, and Jeanne Sadykova. “Examine the Need for Retraining and Advanced Training”. Рroblems of engineering and professional education 26, no. 4-5 (March 10, 2023): 32–38. Accessed May 15, 2024. https://bulprengpe.enu.kz/index.php/main/article/view/624.