1. Aula, P.: Chromosome breaks in leukocytes of chickenpox patients. Preliminary communication. Hereditas (Lund)49, 451 (1963).
2. Becker, J. H., u.H. Esser: Zur Klinik der Porphyrie. Dtsch. Z. Nervenheilk.173, 359 (1955).
3. Bleckat, G., u.G. Strube: Akute intermittierende Porphyrie. Münch. med. Wschr.109, 233 (1967).
4. Boackle, L. A.: A familial study in porphyrias and porphyrinurias. Amer. J. med. Technol.25, 33 (1959).
5. Brugsch, J.: Porphyrine. Leipzig: Johann Ambrosius Barth 1959.