Wright, N. H., Vessey, M. P., Kenward, B., McPherson, K., & Doll, R. (1978). Neoplasia and dysplasia of the cervix uteri and contraception: A possible protective effect of the diaphragm. Nature Publishing Group.

Wright, N. H., M. P. Vessey, B. Kenward, K. McPherson, و R. Doll. Neoplasia and Dysplasia of the Cervix Uteri and Contraception: A Possible Protective Effect of the Diaphragm. Nature Publishing Group, 1978.

Wright, N. H., et al. Neoplasia and Dysplasia of the Cervix Uteri and Contraception: A Possible Protective Effect of the Diaphragm. Nature Publishing Group, 1978.