S. Authayanun, T. Pornjarungsak, T. Prukpraipadung, D. Saebea, A. Arpornwichanop, and Y. Patcharavorachot, “SOFC Running on Steam Reforming of Biogas: External and Internal Reforming”, Chemical Engineering Transactions, vol. 52, pp. 361-366, Aug. 2016.