Войтов, В.А., И.И. Сысенко, and А.Г. Кравцов. 2014. “Tribological Properties of Engine Oils for Two-Stroke Internal Combustion Engine Plant-Based”. Problems of Tribology 71 (1):27-37. https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/87.