Jamshidbek Khasanov, Nodir Turakhodjaev, Shohruh Khudoyqulov, Shirinkhon Turakhujaeva, Sheroz Shukuraliev, and Xilola Mavlyankulova. “Mathematical Model of Copper Phosphide Effect on Wear Resistance Properties of Gray Cast Iron Alloys”. Eurasian Journal of Engineering and Technology, vol. 17, Apr. 2023, pp. 1-5, https://geniusjournals.org/index.php/ejet/article/view/3804.