1. Current Academic Research in Sulphur Chemistry 1968. The Sulphur Institute Washington D. C. and London December 1968; Current Academic Research in Sulphur Chemistry North America 1969. The Sulphur Institute Washington D. C. and London September 1969.
2. E. g.:F. A.v. Wasserberg:Chemische Abhandlung vom Schwefel. J. P. Krauss Wien 1788.