1. Bayliss, VM, Starling, EH. 1899. The movements and innervation of the small intestine. J Physiol, 24, 99–143.
2. Bayliss, VM, Starling, EH. 1901. The movements and innervation of the small intestine. JPhysiol, 26,125–38.
3. Brasseur, JG. 1993. Mechanical studies of the esophageal function. Dysphagia, 8, 384–6.
4. Cannon, WB. 1911. The Mechanical Factors of Digestion. Edward Arnold: London.
5. Colstrup, H, Mortensen, J, Kristensen, K. 1983. A probe for measurement of related values of cross-sectional area and pressure. Urology Res, 11, 139–43.