Issafira, Radissa Dzaky, Muhammad Daru Fatkhur Rizki, Mokh Ausin Al Qoroni, and Vrischo Candra Kumara Wardana. “The Effect of Coal and Sawdust Co-Firing on Boiler Efficiency With the Direct and Indirect Calculation Methods at PT PLN Nusantara Power Unit 2”. Jurnal Rekayasa Mesin 20, no. 2 (August 31, 2025): 319–328. Accessed October 10, 2025. https://jurnal.polines.ac.id/index.php/rekayasa/article/view/6548.