Kholmirzaev Javlonbek, and Masodiqov Jaxongirmirza. “The Developed Method for Evaluation of the Oil Spot of Engine Oil of Motor Vehicles by Comprehensive Criteria for Diagnostics of the Technical Condition of Engine Oil”. Texas Journal of Engineering and Technology, vol. 8, May 2022, pp. 94-96, https://zienjournals.com/index.php/tjet/article/view/1655.