1. Biber, B. , O. Lundgren and J. Svanvik , An indicator-dilution technique for studying mean transit time and blood flow in the mucosa-submucosa of the small intestine. Acta physiol. scand. 1969. Suppl. 330. 99.
2. Studies on the relationship between flow resistance, capillary filtration coefficient and regional blood volume in the intestine of the cat;Folkow;Acta physiol. scand.,1963