Multiresolution edge detection and classification: noise characterization. - José Ramón Beltrán; Fernando Beltrán Blázquez; Angel Estopanan (SMC, 1998)

A new topology for a sigma-delta audio power amplifier. - Antonio Zorzano Martínez; Fernando Beltrán Blázquez; José Ramón Beltrán Blázquez (ISCAS (5), 2004)

Instantaneous frequency estimation and representation of the audio signal through Complex Wavelet Additive Synthesis. - Jesús Ponce de León; José Ramón Beltrán Blázquez; Fernando Beltrán Blázquez (Int. J. Wavelets Multiresolution Inf. Process., 2014)