1. Indicators of effective cytological sampling of the uterine cervix;Woodward;Lancet,1989
2. Relationship between the diagnosis of epithelial abnormalities of cervical smears and the composition of cervical smears;Vooijs;Acta Cytol,1986
3. De advisering bij afwijkende bevindingen van cytologisch onderzoek van de cervix uteri;Vooijs;Ned Tijdschr Geneeskunde,1987
4. A randomized trial of three methods of obtaining Papanicolaou smears;Pretorius;Obstet Gynecol,1991
5. The Pap smear;Boon,1991