1. Akasofu, S.-I., December 1965, The aurora, Sci. Amer., 213:54–62.
2. Akasofu, S.-I., Chapman, S., and Meng, C.-I., 1965, The polar electrojet, J. Atmos. Terr. Phys. 27: 1275.
3. Akasofu, S.-I., and Chapman, S., 1972, “Solar-Terrestrial Physics,” Clarendon Press, Oxford.
4. Axford, W. I., and Hines, C. O., 1961, A unifying theory of high-latitude geophysical phenomena and geomagnetic storms, Can. J. Phys. 39: 1433.
5. Biermann, L., 1951, Kometenschweife und solare korpuskularstrahlung, Z. Astrophys., 29:274.