by Nikita, K.S., Cavagnaro, M., Bernardi, P., Uzunoglu, N.K., Pisa, S., Piuzzi, E., Sahalos, J.N., Krikelas, G.I., Vaul, J.A., Excell, P.S., Cerri, G., Chiarandini, S., De Leo, R., Russo, P.
Published in IEEE transactions on microwave theory and techniques (01.12.2000)