[1] Firoiu I., Naforniţă C., Boucher J. M., Isar A., Image Denoising Using a New Implementation of the Hyperanalytic Wavelet Transform, IEEE Transactions on Instrumentation and Measurements, vol. 58, Issue 8, August 2009, pp. 2410-2416, Digital Object Identifier 10.1109/TIM.2009.2016375, ISSN: 0018-9456, http://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=5159565&isYear=2009.

[2] I. Buciu, I. Naforniţă, Feature extraction through phase congruency for facial expression analysis,
International Journal of Pattern Recognition and Artificial Intelligence, Special Issue on Facial Image Processing and Analysis, Volume 23, Issue 3, 617 - 635, 2009.