1. Coitus-induced ovulation;Jochle;Contraception,1973
2. A critical and statistical study of the determination of sex, particulary in human offspring;Pike;Amer. Natur.,1907
3. Cycle day of insemination, coital rate, and sex ratio;James;Lancet,1971
4. Zagadnenie determinacji plci u ludzi w świetle wlastnych badań;Benendo;Endokr. Pol.,1970
5. Factors influencing sex ratios;Shettles;Int. J. Gynecol. Obstet.,1970