1. Voelter, W. and Müller, J., Liebigs Ann. Chem., (1983)248.
2. Jungfleisch, E., Kalbacher, H., Tzougraki, C. and Voelter, W., In Bayer, E. and Jung, G. (Eds.) Peptides 1988, Walter de Gruyter, Berlin, New York, 1989, p. 73.
3. Voelter, W., Breipohl, G. and Jungfleisch-Turgut, E., Coll. Czech. Chem. Commun., accepted for publication.
4. Voelter, W. and Jungfleisch-Turgut, E., Proceedings of the 3rd Akabori Conference, German-Japanese Symposium on Peptide Chemistry, 1989, p. 19.
5. Voelter, W. and Jungfleisch-Turgut, E., 4th Meeting on Bioorganic Chemistry of Peptides, Prague, 1989.