@ARTICLE {1661,
author={J. C. Pedro and J. P. M. Martins},
doi={10.1109/TMTT.2006.879171},
journal={IEEE Transactions on Microwave Theory and Techniques},
title={Amplitude and Phase Characterization of Nonlinear Mixing Products},
year={2006},
month={August},
volume={54},
number={8},
pages={3237-3245 },
ISSN={0018-9480}
}