1. Schönberg, A., Schenck, G. O., Neumüller, O.-A.: Preparative organic photochemistry, Second Ed., Springer-Verlag New York, Inc. Berlin-Heidelberg New York: Springer 1968.
2. Annual survey of photochemistry, Wiley-Interscience, New York, N. Y. Three volumes of this annual review have been published. The latest, Vol. 3 (1971) covers the literature of 1969.
3. Bryce-Smith, D. (Senior Reporter): Photochemistry, Specialist Periodical Report, The Chemical Society of London, Vol. 1, 1970; Vol. 2, 1971. The last volume covers the literature, July 1969 to June 1970.
4. Listed in Herndon, W. C.: Chem. Rev. 72, 157 (1972).
5. Chesick, J. P.: J. Am. Chem. Soc. 85, 3718 (1963).