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2. Prostaglandin F and progesterone levels in surgically aborted goats;Cooke;Int. Res. Commun. Systems Med. Sci.,1975
3. The fibrous nature of the human cervix;Danforth;Am. J. Obstet. Gynecol.,1947
4. Connective tissue changes incident to cervical effacement;Danforth;Am. J. Obstet. Gynecol.,1960
5. The effect of pregnancy and labor on the human cervix: changes in collagen, glycoproteins and glycosaminoglycans;Danforth;Am. J. Obstet. Gynecol.,1974