1. Über umkehrbare photochemische Reaktionen im homogenen System
2. Molecular Association, Vol. 1 (Ed. ), Academic Press, London 1975.
3. The Exciplex (Eds. u. ), Academic Press, New York 1975.
4. Adv. Photochem., Vol. 10, Wiley-Interscience, New York 1975.