1. R.R. Bonetti and A.E. Williams. "A Narrowband Filter with a Wide Spurious-Free Stopband."
1992 MTT-S International Microwave Symposium Digest 92.3 (1992 Vol. III [MWSYM]): 1331-
1333.
2. E.N. Torgow and P.D. Lubell. "Bandpass Filters with Steep Skirt Selectivity." 1964 PTGMTT
International Symposium Program and Digest 64.1 (1964 [MWSYM]): 22-26
Thanks alot
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