1. The passage of different food-stuffs from the stomach and through the small intestine;Cannon, W.B.;Am J Physiol,1904
2. Radiologische untersuchungen des magens und darmes beim lebenden menschen;Rieder, H.;MMW,1904
3. Skiagraphy of the stomach and intestines;Hulst, H.;Physn Surg,1905
4. The anatomy of the normal small intestine as observed roentgenographically;Morse, R.W.; Cole, L.G.;Radiology,1927
5. A method for the direct visualisation of lesions in the small intestine;Pesquera, G.S.;AJR