Y. Alssafar, Saifalden, and Faleh H. M. Al-Mahdawi. “New Study of Mgo Nps in Drilling Fluid to Reduce Stick-Slip Vibration in Drilling System”. Iraqi Journal of Chemical and Petroleum Engineering, vol. 20, no. 2, June 2019, pp. 51-59, https://doi.org/10.31699/IJCPE.2019.2.7.