KudaybergenovК., MusakulovaМ., OngarbayevЕ., and Z. Mansurov. 2011. “Sorbents from Agricultural Wastes for Utilization of the Crude Oil at Accident Spills on Water Area”. Chemical Bulletin of Kazakh National University 61 (1), 141-47. https://bulletin.chemistry.kz/index.php/kaznu/article/view/873.