Kantschewa, M., Delannay, F., Jeziorowski, H., Delgado, E., Eder, S., Ertl, G., & Knozinger, H. (1984). Nature and Properties of a Potassium-promoted Nimo/al2o3 Water Gas Shift Catalyst. Journal of Catalysis, 87(2), 482-496. https://doi.org/10.1016/0021-9517(84)90209-4 (Original work published 1984)