1. Ullmanns Enzylkopädie der Technischen Chemie, Bd. 18, 3. Aufl., Wasserstoff.
2. W. Balthasar, P. J. Hambleton: Industrial Scale, Production of Hydrogen from Natural Gas, Naphta and Coal. Int. J. Hydrogen Energy 5, No. 1 (1980).
3. T. R. Roszkowski, N. W. Snyder: Present and Emerging Hydrogen Production Technology. In: Proc., 4th. World Hydr. Energy Conf. Vol. 1. pp. 47–68. Pasadena 1982.
4. P. V. Clifton: The Schultz Steam Iron Process. Industr. Eng. Chem. 21, 161–166 (1959).
5. J. B. Pohlenz, L. O. Stine: New Process Promises Low Cost Hydrogen. Oil and Gas 23, 127–132 (1962).