* Matthaei، George L.; Young، Leo; Jones، E. M. T. "Microwave Filters، Impedance-Matching Networks، and Coupling Structures"، New York: McGraw-Hill 1964 .
*Matthaei, George L.; Young, Leo; Jones, E. M. T. "Microwave Filters, Impedance-Matching Networks, and Coupling Structures", New York: McGraw-Hill 1964 .