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References
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- Calder A. A., Embrey M. P., Hiller K. Extra-amniotic prostaglandin E, for the induction of labour at term. Journal of Obstetrics and Gynaecology of the British Commonwealth 1974; 81: 39–46
- Stewart P. Prostaglandins and the difficult induction. The Role of Prostaglindins in Labour, D. Wood. Royal Society of Medicine, London 1985; 69–73
- Stewart P., Kennedy J. H., Hillan E., Calder A. A. The unripe cervix: management with vaginal or extra-amniotic prostaglandin E. Journal of Obstetrics and Gynaecology 1983; 4: 90–93