1. Eugen Bogdan Aburel (1899-1975). The pioneer of regional analgesia for pain relief in childbirth;Curelaru;Anaesthesia,1982
2. L’anesthésie locale continue (prolongée) en obstétrique;Aburel;Bulletin de la Societé d’Obstétrique et Gyncéologie de Paris,1931
3. Epidural analgesia for labor: current techniques;Silva;Local Reg. Anesth. Dove Press Med.,2010
4. Historic timeline of obstetric anaesthesia;McKenzie,2016
5. Hypertonic saline instillation;Kerenyi,1981