1. J.C. Montaño, M. Castilla, J. Gutierrez, A. López, Sistema de medida y vigilancia de la calidad del suministro de potencia eléctrica, 5 as Jornadas Hispano-Lusas de Ingeniería Eléctrica, Salamanca, Spain, pp. 1643–1650, July 1997.
2. B.V. Brower, Low-bit rate image compression evaluation, SPIE, Orlando, FL, April 1994. SPIE
3. H. Guo, M. Lang, J.E. Odegard and C.S, Burrus. “Nonlinear Shrinkage of Undecimated DWT for noise reduction and data compression”. Proceedings International Conference on Digital Signal Processing. June 1995. Limasol, Cyprus.
4. D.L. Donoho. “De-noising by Soft-thresholding”. IEEE Trans. Inform. Theory, 41(3), pp. 613–627. May 1995.
5. D.L. Donoho, I.M. Johnstone. Ideal denoising in an ortonormal basis chosen from a library of bases,. Dept. of Statistics, Stanford Univ.,1994.