1. Andersson, S., Grossman, M. I.: Profile of pH pressure and potential difference at gastro* duodenal junction in man. Gastroenterology 49, 364–371 (1965).
2. Besançon, F., Baujat, J. P., Debray, C.: Le reflux gastro-œsophagien: étude pH graphique et électromanographique. Sem. Hop. Paris 38, 1569–1576 (1962).
3. Booth, D. J., Kemmerer, W. T., Skinner, D. B.: Acid clearing from the distal esophagus. Arch. Surg. 96, 731–734 (1968).
4. Borgeskov, S., Lockwood, K., Bertelsen, S., Hasner, E.: Simultaneous pressure and hydrogen ion measurements in the esophagus and stomach. Acta chir. scand, Suppl. 356B, 105–112 (1966).
5. Donner, M. W., Silbiger, M. L., Hookman, P., Hendrix, T. R.: Acid barium swallows in the radiographic evaluation of clinical esophagitis. Radiology 87, 220–225 (1966).