1. Caroff L.J., Scargle J.D., 1970, Nature 225, 168.
2. Eastlund B.J., in “The Crab Nebula”, Symp. I.A.U. No. 46, ed. by Davies R.D. and Smith F.G., 1971, p.443.
3. Ginzburg V.L., preprint No. 93, Lebedev Physical Institute, 1970.
4. Kundu M.R., 1965, Solar Radio Astronomy, John Wiley and Sons, Inc., New York.
5. Crawford F.W., Tataronis J.A., 1970, J. Plasma Physics 4, 231.