1. Batterink, G.J., Kremer, J. and Jager, S. (1983). The effect of oral kallikrein treatment on sperm motility in asthenozoospermia. Int. I. Androl., 6,173–9
2. Collins, J.A., Wrixon, W., Janes, J.B. and Wilson, E.J. (1983). Treatment-independent pregnancy among infertile couples. N. Engl. J. Med., 309, 1201–6
3. Comhaire, F. (1976). Treatment of oligospermia with Tamoxifen. Int. J. Fertil.
21, 232–8
4. Comhaire, F. and Vermeulen, L. (1983). Effect of high dose oral Kallikrein treatment in men with idiopathic subfertility: evaluation by means of in vitro penetration test of zona free hamster ova. Int. J. Androl., 6, 168–72
5. Hargreave, T.B. and Nillson, S. (1984). Seminology. In Hargreave, T.B. (ed.) Infertility, pp. 56–74. (Berlin, Heidelberg, New York: Springer Verlag)