Asif M, Hussain MA, Riaz A, Mujahid R, Akram MS, Haider B, Kanwal S, Zeb H. A physical coal cleaning approach for clean energy production from low grade Lakhra coal of Pakistan using diester table. JPIChE [Internet]. 2023 Sep. 7 [cited 2025 Oct. 31];51(2). Available from: https://www.piche.org.pk/journal/index.php/jpiche/article/view/557