Zhakebayev, D., A. Abdibekova, and Y. Dyuisaliyev. “Numerical Modeling of the Spreading Oil Slick in the Caspian Sea”. International Journal of Mathematics and Physics, vol. 7, no. 2, Dec. 2016, pp. 4-10, https://ijmph.kaznu.kz/index.php/kaznu/article/view/197.