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, R.F.;J Lab Clin Med,1953
2. Vitamin B12 absorption tests. Their unreliability in postgastrectomy states;Mahmud, K.; Ripley, D.; Doscherholmen, A.;JAMA,1971
3. Inhibitory effect of eggs on vitamin B12 absorption: description of a simple ovalbumin 57Co-vitamin B12 absorption test;Doscherholmen, A.; McMahon, J.; Ripley, D.;Br J Haematol,1976
4. Malabsorption of vitamin B12 after vagotomy;Streeter, A.M.; Balasubramaniam, D.; Boyle, R.; O'Neill, B.J.; Pheils, M.T.;Am J Surg,1974
5. Vitamin Bl2 turnover in man. The assimilation of vitamin B12 from natural foodstuff by man and estimates of minimal daily dietary requirements;Heyssel, R.M.; Bozian, R.C.; Darby, W.J.; Bell, M.C.;Am J Clin Nutr,1966