1. Hightower, N. C., Code, C. F., andMaher, F. T. A method for the study of gastrointestinal motor activity in human beings.Proc Mayo Clin 24:453, 1949.
2. Texter, E. C. Fluorocinematography.Amer J Dig Dis 6:983, 1961.
3. Watson, B. W., Ross, B., andKay, A. W. Telemetering from within the body using a pressure-sensitive radio pill.Gut 3:181, 1962.
4. Brody, D. A., andQuigley, J. P. Application of the “inductograph” to the registration of movements, particularly of body structures such as the pyloric sphincter.J Lab Clin Med 29:863, 1944.
5. Jacoby, H. I., Bass, P., andBennett, D. R. In vivo extraluminal contractile force transducer for gastrointestinal muscle.J Appl Physiol 18:658, 1963.