Zhang, T., Fan, Q. and Shu, H. (2009) Approximation of BV Function by Piecewise Constants and Its Application in Signal Denoising and Compression. 2nd International Congress on Image and Signal Processing, Tianjin, 17-19 October 2009, 1-5.
 Donoho, D.L. and Johnstone, J.M. (1994) Ideal Spatial Adaptation by Wavelet Shrinkage. Biometrika, 81, 425-455.
 Donoho, D.L. and Johnstone, I.M. (1995) Adapting to Unknown Smoothness via Wavelet Shrinkage. Journal of the American Statistical Association, 90, 1200-1224.