1. Vitamin-B12-Resorptionsstörungen bei PAS-Therapie.;Bleifeld;Dtsch. med. Wschr.,1965
2. Malabsorption of vitamin B12 during treatment with para-aminosalicylic acid. A preliminary report.;Heinivaara;Acta med. scand.,1964
3. Malabsorption and deficiency of vitamin B12 caused by treatment with para-aminosalicylic acid.;Heinivaara;Acta med. scand.,1965
4. Selectivity of the PAS-induced malabsorption of vitamin B12.;Heinivaara;Ann. Med. intern. Fenn.,1964
5. Radioactive vitamin B12 absorption in the megaloblastic anaemia caused by anticonvulsant drugs.;Lees;Quart. J. Med.,1961