1. Alfvén and Malmfors , 1943: Directional measurements of cosmic radiation, Ark. f. mat., astr. o. fys. 29 A, N:o 24.
2. Changes in cosmic ray intensity associated with magnetic storms;Alfvén;Nature,1946
3. On the origin of cosmic rays;Alfvén;Phys. Rev.,1949
4. On the instability of the barytron and the temperature effect of cosmic rays;Blackett;Phys. Rev.,1938
5. The geophysical aspect of cosmic rays;Duperier;Proc. Phys. Soc.,1945