1. K. Nikolics, D. H. Coy, J. A. Vilches-Martinez, E. T. Coy, and A. V. Schally, In. J. Pept. Prot. Res.,9, 57 (1977).
2. V. P. Golubovich, L. I. Kirnarskii, A. A. Akhrem, and S. G. Galaktionov, Bioorg. Khim.,7, 819 (1981).
3. J. Seprodi, D. H. Coy, J. A. Vilches-Martinez, E. Pedroza, W. Y. Huang, and A. V. Schally, J. Med. Chem.,21, 993 (1978).
4. B. Donzel, J. Rivier, and M. Goodman, Biopolymers,16, 2587 (1977).
5. J. Rivier, C. Rivier, M. Perrin, J. Porter, and W. Vale, in: LH-RH Peptides and Male and Female Contraceptives, [G. I. Zatuchni, T. D. Shelton, and J. J. Sciarra (eds.)], Harper and Row, Philadephia (1981).