1. Routine analysis of porphyrines in urine.;Askevold;Scand. J. clin. Lab. Invest.,1951
2. Porphyria cutanea tarda treated by repeated venesection: clinical and biochemical response.;Baker;Proc. roy. Soc. Med.,1969
3. Observations on porphyria cutanea tarda.;Brunsting;Arch. Derm. Syph. (Chic.),1954
4. Acquired porphyria cutanea tarda. Two cases treated by repeated phlebotomies.;Danby;Canad. med. Ass. J.,1966
5. Determination of urinary uroporphyrin by a direct extraction method.;Dresel;Scand. J. clin. Lab. Invest.,1956