1. Electroejaculation;Ohl;Urol. Clin. N. Amer.,1993
2. Pregnancies after intracytoplasmic injection of single spermatozoon into an oocyte;Palermo;Lancet,1992
3. Gamete micromanipulation to facilitate fertilization;Palermo,1995
4. Eid, J. F.: Electroejaculation. AUA Update Series, vol. 11, No. 10, 1992.
5. WHO Laboratory Manual for the Examination of Human Semen and Sperm-Cervical Mucous Interaction,1992