1. Bodanszky, M., Martinez, J.: Synthesis, 333 (1981)
2. Bodanszky, M., Martinez, J.: in “The Peptides”, Vol. V (Gross, E., Meien-hofer, J., Eds.), p. 111, New York: Academic Press 1983
3. Bodanszky, M., Bednarek, M. A., Bodanszky, A.: Int. J. Peptide Protein Res. 20, 387 (1982)
4. Kemp, D. S.: in “The Peptides”, Vol I (Gross, E., Meienhofer, J., Eds.), p. 315, New York: Academic Press 1979
5. Iselin, B., Feurer, M., Schwyzer, R.: Helv. Chim. Acta 38, 1508 (1955)