Wu, C.-H., Krieger, W., & Rohwerder, M. (2019). On the robustness of the Kelvin probe based potentiometric hydrogen electrode method and its application in characterizing effective hydrogen activity in metal: 5 wt. % Ni cold-rolled ferritic steel as an example. Science and Technology of Advanced Materials, 20(1), 1073-1089. doi:10.1080/14686996.2019.1687255.