Sulistiyo, Eko, and Firman Prasetyo. “Identifikasi Material Tube High Pressure Economizer HRSG Unit 2.3 PLTGU UP Semarang”. JURNAL POWERPLANT 4, no. 2 (December 16, 2019): 76–85. Accessed May 16, 2024. https://jurnal.itpln.ac.id/powerplant/article/view/845.