1. Diploma Thesis, Univ. Dortmund 1978.
2. See. e.g., ?Silylenes?, in : Reactivé Intermediates. Wiley, New York 1978.
3. review: ?The Stannylenes R2Sn?, in : The Organometallic and Coordination Chemistry of Germanium. Tin and Lead. Freund Publ., Tel Aviv 1978.
4. Diorganostannylenes