2005
L. Pérez-Freire y Pérez-González, F., «Spread-spectrum vs. quantization-based data hiding: misconceptions and implications», in Security, Steganography, and Watermarking of Multimedia Contents, San Jose, California, USA, 2005, vol. 5306, pp. 592-601.
2004
L. Pérez-Freire, Pérez-González, F., y Voloshynovskiy, S., «Revealing the true achievable rates of Scalar Costa Scheme», in IEEE International Workshop on Multimedia Signal Processing, Siena, Italy, 2004, pp. 203-206.