حسين ذاج, شاهين دنصم. Measurement of Application Gap of Energy Management System According to The Standard ISO 50001:2011/ Case Study in North Oil Company. Journal of Petroleum Research and Studies [Internet]. 2019Dec.1 [cited 2024May4];9(4):1-22. Available from: https://jprs.gov.iq/index.php/jprs/article/view/317