C. Vogel, и G. Kubin. Proceedings of the 2004 URSI International Symposium on Signals, Systems, and Electronics. ISSSE 2004., стр. 214--217. (августа 2004)
S. Saleem, и C. Vogel. Proceedings of 33rd International Conference on Telecommunications and Signal Processing (TSP 2010), стр. 151--155. (августа 2010)