Alsaadi, Dr.Dar, Valery Ostrikov, and Waad Khalaf. “IMPROVEMENT OF TRIBOLOGICAL PROPERTIES FOR LUBRICANTS BY ADDING GRAPHENE CONCENTRATE”. Al-Salam Journal for Engineering and Technology 1, no. 1 (January 10, 2022): 20–25. Accessed June 30, 2024. http://journal.alsalam.edu.iq/index.php/ajest/article/view/7.