REFERENCES
- Allen, W. M. J. clin. Endocr. 1950, 10, 71–83.
- Anson, M. L. J. gen. Physiol. 1938, 22, 79–89.
- Augur, N. A. Gastorenterology 1970, 58, 311–320.
- Barclay, A. E. & Bentley, F. H. Gastroenterology 1949, 12, 177–183.
- Barlow, T. E., Bentley, F. H. & Wälder, D. N. Surg. Gynec. Obstet. 1951, 93, 657–671.
- Brodie, B. B. & Axelrod, J. J. Pharmacol, exp. Ther. 1960, 99, 171–180.
- Brown, J. C., Mutt, V. & Dryburgh, J. R. Canad. J. Physiol. 1971, 49, 399–405.
- Brown, B. L., Albano, J. D. M. F., Kins, R. P. & Sgherzi, A. M. Biochem. J. 1971, 121, 561–562.
- Cowley, D. G. & Code, C. F. Amer. J. Physiol. 1970, 218, 270–274.
- Cumming, J. D. & Percival, H. G. J. Physiol. (Lond.) 1967, 191, 81P–82P.
- Dyck, W. P., Werther, J. L., Rudick, J. & Janowitz, H. D. Gastroenterology 1969, 56, 488–495.
- Folkow, B. Gastroenterology 1967, 52, 423–432.
- Gilman, A. G. Proc. nat. Acad. Sci. (Wash.) 1970, 67, 305–312.
- Gregory, R. A. J. Physiol. (Lond.) 1958, 144, 123–127.
- Haigh, A. L. & Steedman, W. M. J. Physiol. (Lond.) 1968, 198, 79P–80P.
- Heisler, S., Fast, D. & Tenenhouse, A. Biochim. biophys. Acta (Amst.) 1972, 279, 561–572.
- Jacobson, E. D., Linford, R. H. & Grossman, M. I. J. clin. Invest. 1966, 45, 1–13.
- Jacobson, E. D., Swan, K. G. & Grossman, M. I. Gastroenterology 1967, 52, 414–420.
- Kulka, R. G. & Sternlicht, E. Proc. nat. Acad. Sci. (Wash.) 1968, 61, 1123–1128.
- Rick, W. & Fritsch, W.-P. pp. 962–966, in Bergmeyer, H. U. (ed.) Methoden der enzymatischen Analyse. Verlag Chemie, Weinheim/ Bergstr., 1970.
- Ridderstap, A. S. & Bonting, S. L. Pflügers Arch. ges. Physiol. 1969, 313, 62–70.
- Rudick, J., Werther, J. L., Chapman, M. L. Dreiling, D. A. & Janowitz, H. D. Gastro-enterology 1971, 60, 263–271.
- Ruppin, H., Domschke, S., Domschke, W., Wünsch, E., Jaeger, E. & Demling, L. Scand. J. Gastroent. 1975, 10, 199–202.
- Schedl, H. P. & Clifton, J. A. Gastroenterology 1961, 41, 491–499.
- Snedecor, G. W. & Cochran, W. G. Statistical Methods (6th ed.). Ames, Iowa, The Iowa State University Press, 1967.
- Sutherland, E. W. J. Amer. med. Ass. 1970, 214, 1281–1288.
- Wünsch, E., Brown, J. C., Deinier, K.-H., Drees, F., Musiol, J., Scharf, R., Stocker, H., Thamm, P. & Wendlberger, G. Z. Naturforsch. 1973, 28c, 235–240.