1. K. Grob, Helvetia Chimica Acta51, 718 (1968)
2. K. Grob u.G. Grob, J. Chromatog. Sci.7, 584 (1969)
3. D. Henneberg andG. Schomburg, reprint of a paper presented at the Triennial International Mass Spectrometry Conference, Brüssel Sept. 1970
4. K. Grob andJ. A. Völlmin, Beiträge z. Tabakforschung5
5. K. Grob, private communication.