1. Flowers, C. E.;Hellman, L. M.; &Hingson, R. A. Peridural Anaesthesia and Analgesia for Labour, Delivery and Caesarean Section — Continuous. Curr. Res. Anes. and Anal.28:4181 (1948).
2. Catton, D. V. Epidural Analgesia for Labour and Delivery. Anesth. & Anal.48:587 (1969).
3. Af Ekerstam, B.;Egner, B.; &Petterson, G. N-Alkyl Pyrolidine and n-Alkyl Piperidine Carboxylic Acid Amides. Acta Chem. Scand.22:1183 (1957).
4. Widman, B. Clinical trial of a new local anaesthetic (lac-43) with the aid of the pinprick and ninhydrin methods in finger blocks Acta Anesth. Scand.8:219 (1964).
5. Henn, F. &Brattsand, R. Some Pharmacological and Toxicological Properties of a new Long-Acting Local Analgesic,lac-43 (Marcaine), in comparison with Mepivacaine and Tetracaine. Acta Anesth. Scand. Suppl.21:9 (1966).