1. ABRAHAM, L. G. (1953) Extensions of the Magnetoionic Theory for Radio-Wave Propagation in the Ionosphere including Antenna Radiation and Plane Wave Scattering, School of Electrical Engineering, Cornell University, Tech. Report No. 13.
2. Impedance of a cylindrical dipole having a sinusoidal current distribution in homogeneous anisotropic ionosphere;AMENT;NBS J. Res. (Radio Science),1964
3. AMENT, W. S., KATZIN, M., MCLAUGHLIN, J. R. and ZACHARY, W. W. (1965) Satellite Antenna Radiation Properties at VLF in the Ionosphere, Final Report on Contract Nonr-4250 (00)(X), Electromagnetic Research Corporation, College Park, Md.
4. Theory of radiation from sources in anisotropic media;ARBEL,1963
5. BACHYNSKI, M. P. (1966) Sources in unbounded plasmas, Fifteenth General Assembly of URSI, Munich, Germany.