1. Babkin, B.Secretory Mechanisms of the Gastro-intestinal Tract.
2. FitzGerald, O.Nature, 1946, 158, 305;
3. Steinet al. (1948).Surg., Gyn. and Obst., 87, 188.
4. Santyet al. (1948).Lyon Chir., 43, 60.
5. Priestly (1947).Surg. Clin., N. Amer., 27, 905.