1. Alissandrakis, C.E.: 1977, “Six Centimeter Wavelength Observations of Solar Active Regions and Bursts with Six Arc-Seconds Resolution”, University of Michigan (Ph.D. Thesis).
2. Chiuderi-Drago, F., Felli, M., and Tofani, G.: 1977, Astron. Astrophys. 61, 79o
3. Felli, M., Pampaloni, P. and Tofani, G.: 1974, Solar Phys. 37, 395.
4. Kundu, M.R. and Alissandrakis, C.E.: 1975, Nature 257, 465.
5. Kundu, M.R., Becker, R.H. and Velusamy, T.: 1974, Solar Phys. 34, 185.