1. The gyrator, a new electric network element;Tellegen;Philips Res. Rep.,1948
2. The elements of nonreciprocal microwave devices;Hogan;Proc. IRE,1956
3. “Microwave Ferrites and Ferrimagnetics.”;Lax,1962
4. The microwave gyrator;Hogan;Bell Syst. Tech. J.,1952
5. A new technique in ferrite phase shifting for beam scanning of microwave antennas;Reggia;Proc. IRE,1957