Leal-Sevillano, C. A., J. R. Montejo-Garai, J. A. Ruiz-Cruz, and J. M. Rebollar,  "Low-Loss Elliptical Response Filter at 100 GHz",  Microwave and Wireless Components Letters, IEEE, vol. 22, no. 9, pp. 459 -461, September, 2012.

Ruiz-Cruz, J. A., Y. Zhang, J. M. Rebollar, K. A. Zaki, J. R. Montejo-Garai, and A. J. Piloto,  "TEM Mode-Matching Analysis of Multi-coupled Strip-line Filters",  2007 IEEE MTT-S International Microwave Symposium Digest, pp. 541-544, June, 2007.

Montejo-Garai, J. R., J. A. Ruiz-Cruz, J. M. Rebollar, A.. Onoro-Navarro, I. Hidalgo-Carpintero, and M. J. Padilla-Cruz,  "Design of Self-Equalised Elliptic Filter Channels in Ka-Band Implemented in Rectangular H-Plane Waveguide",  Proc. 36th European Microwave Conference, pp. 1087-1090, Sept., 2006.