1. Paracervical block;Abouliesh,1977
2. Paracervical block anesthesia;Asling,1970
3. Human fetal oxygenation following paracervical block;Baxi;American Journal of Obstetrics and Gynecology,1979
4. Obstetrical paracervical block with chloroprocaine or bupivacaine;Belfrage;Acta Obstetrica et Gynecologica Scandinavia,1983
5. Neural blockade for obstetrics and gynecology;Brownridge,1980