1. Intrinsic factor studies: II. The effect of gastric juice on the urinary excretion of radioactivity after the oral administration of radioactive vitamin B12;Schilling;J Lab Clin Med,1953
2. The urinary excretion of labelled vitamin B12;Callender;Clin Sci,1955
3. Time to drop cyanocobalamin;Anonymous.;Drug Ther Bull,1984