Saeedi, H. ., Jalali, S. E. ., Noroozi, M. and Behraftar, S. . (2021) “Prediction of penetration rate of drilling by using rock engineering system approach case study: a well in Azadegan oilfield”, Rudarsko-geološko-naftni zbornik, 36(5). doi: 10.17794/rgn.2021.5.13.