Nugrahani, S.D., Nazaruddin, Y.Y., Ekawati, E. dan Nugroho, S. 2011. Modelling and Optimization of Primary Steam Reformer System Case Study: the Primary Reformer PT Petrokimia Gresik Indonesia. Jurnal Otomasi Kontrol dan Instrumentasi. 1, 1 (Jan 2011), 1. DOI:https://doi.org/10.5614/joki.2009.1.1.1.