1. J.S. Artman and T.E. Tanunelwald, J. Appl. Phys., 26, 1124, 1955.
2. B. Lax and K.J. Button, Microwave Ferrites and Ferrimagnetics, McGraw-Hill, New York, 1962.
3. V.R.K. Murthy and R. Raman, Solid State Commn., 70, No. 8, 847, 1989.
4. L.T. Buranov and I.F. Shchegoler, Translated from Pribory i Tekimilon Eksperiments, No. 2, 171, March-April, 1971.
5. Iroshi Kobayashi, Jap. Jl. Appl. Physics, 10, No. 3, 345, 1971.