1. Cunningham, G. R.: Testicular and post-testicular causes of male infertility. In: White, R. de V. (ed.): Aspects of Male Infertility. Williams & Wilkins Co., Baltimore-London 1982, p. 116.
2. Davis, W. B., Rennard, S. I., Bitterman, P. B., Crystal, R. G.: Pulmonary oxygen toxicity. Early reversible changes in human alveolar structures induced by hyperoxia.N. Engl. J. Med., 13, 878 (1983).
3. Fischer, B. H., Marks, M., Reich, T.: Hyperbaric-oxygen treatment of multiple sclerosis.N. Engl. J. Med., 308, 181 (1983).
4. Fitch, S. M., Harkness, M. L. R., Harkness, R. D.: Extraction of collagen from tissues.Nature (London),176, 163 (1955).
5. Fujii, T.: Roles of age and androgen in the regulation of sex accessory organs. In: Thomas, J. A., Singhal, R. L. (eds): Regulatory Mechanism Affecting Gonadal Hormone Action. Advances in Sex Hormone Research, Vol. 3, University Press, Baltimore-London-Tokyo 1977, p. 103.