The following technical articles are referred to in the text or may be of general interest to you.

1.   Bahl, I.J. and Garg, R., "A Designer's Guide to Stripline Circuits," Microwaves, January 1978, pp. 90-96.

2.   Bryant, T.G. and Weiss, J.A., "Parameters of Microstrip Transmission Lines and of Coupled Pairs of Microstrip Lines," IEEE Trans. on MTT, Vol. MTT-16, December 1968, pp. 1021-1027.

3.   Cohn, S., "Shielded Strip Transmission Line," IEEE Trans. on MTT, October 1955, pp. 29-37.

4.   Gupta, K.C., Garg, R., Chadha, R., "Computer-Aided Design of Microwave Circuits," Artech House, 1981.

5.   Lev, James J., "Calculator program synthesizes microstrip coupled lines," Microwaves & RF, Pgs. 215-216, 219-220, May 1984.

6.   Lev, James J., "Synthesize and analyze microstrip lines," Microwaves & RF, Pgs. 111-112, 115, 166, January 1985.

7.  Pramanick, P. and Bhartia, P., "An Accurate Description of Dispersion in Microstrip," Microwave Journal, December 1983, pp. 89-92, 96.

8.   Yamashita, E. and Atsuki, K., "Strip Line with Rectangular Outer Conductor and Three Dielectric Layers," IEEE Trans. on MTT, Vol. MTT-18, May 1970, pp. 238-244.