Lamultree, Suthasinee. “Moving Reference Planes of Unit Cells of Reciprocal Lossy Periodic Transmission-Line Structures”. ECTI Transactions on Electrical Engineering, Electronics, and Communications 16, no. 2 (January 17, 2018): 15-20. Accessed March 1, 2021. https://ph02.tci-thaijo.org/index.php/ECTI-EEC/article/view/171331.