1. Bors, E (1957). Urol. Surv. 7, 177.
2. Bunce, P L (1967). In The Neurogenic Bladder, edited by Boyarsky, S., pp. 196–199. Baltimore: Williams and Wilkins.
3. Gibbon, N O K, Ross, J C & Damanski, M (1965). Int. J. Paraplegia, 2, 264.
4. Pearman, J W & England, E J (1972). The Urological Management of the Patient Following Spinal Cord Injury, p. 116. Springfield, Illinois: Thomas.
5. Tang, P C & Ruch, T C (1955). Amer. J. Physiol. 181, 249.