1. A cosmic cyclotron as a cosmic ray generator;Alfvén;Nature,1936
2. On the motion of cosmic rays in interstellar space;Alfvén;Phys. Rev.,1939
3. On the origin of cosmic radiation;Alfvén;Phys. Rev.,1939
4. A theory of the magnetic storms and the aurorae I;Alfvén;Kgl. Sv. Vet. ak. Handl. Tredje Ser,1939
5. A theory of the magnetic storms and the aurorae II and III;Alfvén;Kgl. Sv. Vet. ak. Handl. Tredje Ser,1940