Evaluasi Nilai Kalor Batubara terhadap Efisiensi Boiler PLTU Suralaya. JTM : JURNAL TEKNIK MESIN, [S. l.], v. 2, n. 2, p. 121–129, 2026. DOI: 10.58466/a1rmw552. Disponível em: https://jurnal.politap.ac.id/index.php/jtm/article/view/2221. Acesso em: 6 aug. 2026.