D. Saebea, Y. Patcharavorachot, V. Hacker, S. Assabumrungrat, A. Arpornwichanop, and S. Authayanun, “Analysis of Unbalanced Pressure PEM Electrolyzer for High Pressure Hydrogen Production”, Chemical Engineering Transactions, vol. 57, pp. 1615-1620, Mar. 2017.