1. “Microwave printed circuits-a historical survey,”;Barrett;IRE Trans. on Microwave Theory and Techniques,1955
2. “Microwave printed circuits-the early years,”;Barrett;IEEE Trans. on Microwave Theory and Techniques,1984
3. “Microstrip-a new transmission technique for the klilomegacycle range,”;Grieg;Proc. IRE,1952
4. “Characteristic impedance of the shielded-strip transmission line,”;Cohn;IRE Trans. on Microwave Theory and Techniques,1954
5. “A universal approximate formula for characteristic impedance of strip transmission lines with rectangular inner conductors,”;Mingins;IRE Trans. on Microwave Theory and Techniques,1955