1) Alexander-Meisels, et al.: Criteria for the cytologic assessment of hyperplasia in endometrial samples obtained by the endopap endometrial sampler, Acta Cytol., 29: 297-302, 1985.
2) Elsa-Skaarland: New concept in diagnostic endometrial cytology: diagnostic criteria based on composition and architecture of large tissue fragments in smears, J. Clin. Pathol., 39: 36-43, 1986.
3) Elsa-Skaarland Nuclear size and shape of epithelial cells from the endometrium: lack of value as a criterion for differentiation between normal, hyperplastic, and malignant conditions, J. Clin. Pathol., 38: 502-506, 1985.