1. The Bethesda System for Reporting Cervical/Vaginal Cytologic Diagnoses
2. Longitudinal study of women with negative cervical smears according to endocervical status;Mitchell;Lancet,1991
3. Contribution of the cytobrush to determining cellular composition of cervical smears;Doornewaard;J Clin Pathol,1990
4. Papanicolaou smears without endocervical cells: are they inadequate?;Kivlahan;Acta Cytol,1985
5. Relationship between the diagnosis of epithelial abnormalities and the composition of cervical smears;Vooijs;Acta Cytol,1984