1. Amundsen, P.: The use of tomography in gas encephalography. J. Oslo Cy Hosp. 18, 145?156 (1968).
2. Amundsen, P., Dugstad, G., Grimsrud, O. K.: Gas encephalography with hypocycloidal, tomography-correlation with anatomic casts. Acta radiol. Diagn. 9, 132?134 (1969).