1. Dating the endometrial biopsy;Niyes;Fertil. Steril.,1960
2. Klinische resultaten bekomen met 6 alpha-methyl-17 alpha-ethinyl-estrenol tijdens volledige borst-voeding;Beuselinck;Bull. Soc. Roy. Gynec. Obstet.,1967
3. Histopathology of the Endometrium;Dallenbach-Hellweg,1971
4. Ovulation in the post-partum period;Sharman;Int. J. Fert.,1967
5. Principles of Gynaecology;Jeffcote,1967