“Pavilichenko L.M., Espolayeva A.R., Izetaeva А.М. Conversion of the Mining Complex of the Mangistau Region: Al-Farabi Kazakh National University, Kazakhstan, Almaty”. 2018. Eurasian Journal of Ecology 47 (2): 58-66. https://bulletin-ecology.kaznu.kz/index.php/1-eco/article/view/873.