1. Reiter, R. J., in: DeGroot's Endocrinology, vol. 1, p. 240. Ed. L. J. DeGroot. Saunders, Philadelphia 1989.
2. Cardinali, D. P., Endocr. Rev.2 (1981) 327.
3. Zisapel, N., and Laudon, M., Brain Res.272 (1983) 378.
4. Zisapel, N., Neural. Transm.73 (1988) 1.
5. Bradbury, A. J., Kelly, M. E., and Smith, J. A., in: The Pineal Gland: Endocrine Aspects, p. 327. Ed. S. D. Wainwright. Pergamon Press, Oxford 1985.