1. M.E.Hines: 1970 IEEE-GMTT International Microwave Symposium. Digest of Papers, pp. 304–307
2. M.E.Hines: 1971 IEEE-GMTT International Microwave Symposium Digest of Papers, pp. 108–109
3. M.E.Hines: IEEE Trans. Microwave Theory Techniques MTT-19, 442 (1971)
4. M.E.Hines: 1972 IEEE-GMTT International Microwave Symposium. Digest of Papers, pp. 236–237
5. P.deSantis, F.Pucci: 1972 IEEE-GMTT International Microwave Symposium. Digest of Papers, pp. 238–240