@INPROCEEDINGS {12739,
author={F. Lopes and V. Santos and L. A. S. C. Cruz},
doi={10.1109/TSP.2012.6256385},
booktitle={International Conf. on Telecommunications and Signal Processing - TSP},
title={A Combinatorial Analysis and a Closed-Form Analytical Expression for the Signal to Third-Order Distortion Ratio in OFDM Signals through Smooth Memoryless Nonlinearity},
year={2012},
month={July},
volume={I},
pages={689-694} 
}