1. Assmann, H. Klinische Roentgendiagnostik der Inneren Erkrankungen. F. C. W. Vogel, Leipzig, 1924.
2. Barclay, A. G. Note on the movement of the large intestine, Arch. Roentgen Ray, 1912, XVI, 422–424.
3. Bayliss, W. M. and Starling, G. H., The movements and the innervation of the large intestine. J. Physiol., 1900-1, XXVI, 107–118.
4. v. Bergmann, G. and Katsch, G. Ueber Darmbewegung und Darmforms, D. M. W, 1913, XXXIX/2, 1295.
5. Buckstein, J. Functional disorders of the large intestine and their treatment, Harper’s Medical Monographs, New York, 1935.