1. Bornemann, J. and M.Mokhtaari, "Initial design and optimization of broad-band and dual-band square-to-circular waveguide transitions," APMC 2005 Proceedings, 2005.
2. Holzman, E. L., "A simple circular-to-rectangular waveguide transition," IEEE Microwave and Wireless Components Letters, Vol. 15, No. 1, 25-26, January January, 2005.
doi:10.1109/LMWC.2004.840969
3. Wexler, A., "Solution of waveguide discontinuities by modal analysis," IEEE Transactions on Microwave Theory and Techniques, Vol. 15, No. 9, 508-517, 1967.
doi:10.1109/TMTT.1967.1126521