1. WATSON, W. H., The physical principles of waveguide transmission and antenna systems (London 1947 ).
2. SILVER, S., Microwave antenna theory and design (MIT Rad. Lab. Ser. 12). (New York 1949 )
3. KRAUSS, J. D., Antennas (New York 1950 ).
4. STRATTON, J. A. u. L. J. CHU, Phys. Rev. 56, 99 (1939).
5. SEVERIN, H., Z. Naturforsch. 1, 487 (1946);