1. Alexander, F.E.S., 1946. The Sun’s radio energy. Radio & Electronics, 1, 16–17, 20.
2. Anderson, K.A., and Lin, R.P., 1966. Observations on the propagation of solar-flare electrons in interplanetary space. Physical Review Letters, 16(24), 1121–1124.
3. Appleton, K.V., and Hey, J.S., 1946. Solar radio noise. Philosophical Magazine, 37, 73–84.
4. Baum, W.A., Johnson, F.S., Oberly, J.J., Rockwood, C.C., Strain, C.V., and Tousey, R., 1946. Solar ultraviolet spectrum to 88 kilometers. Physical Review, 70, 781–782.
5. Blum, E.J., Boischot, A., and Ginat, M., 1957. Le Grand Interféromètre de Nançay. Annales d’Astrophysique, 20, 155–165.