Wijaya, Willy, Ken Okazaki, Kazuyoshi Fushinobu, and Abdul Waris. 2016. “Feasibility Study of Integrating Absorption Heat Pump into Methanol Steam Reforming Process for Hydrogen Production”. Indonesian Journal of Physics 18 (3), 59-66. https://ijphysics.fi.itb.ac.id/index.php/ijp/article/view/157.