1. Bernal, A.J.: Simultaneous approximations of images. Applications to image and video compression. MASc Thesis, Ryerson University (2007)
2. Catuogno, P.J., Ferrando, S.E., Gonzalez, A.L.: H-systems for efficient hedging and approximation of derivatives. In: Proceedings of the Third Brazilian Conference on Statistical Modelling in Insurance and Finance. Maresias, March 25–30, pp. 108–113 (2007)
3. Cohen, A., DeVore, R.A., Hochmuth, R.: Restricted nonlinear approximation. Constr. Approx. 16, 85–113 (2000)
4. Cohen, A., Dahmen, W., Daubechies, I., DeVore, R.: Tree approximation and optimal encoding. Appl. Comput. Harmon. Anal. 11(2), 192–226 (2001)
5. DeVore, R.A., Temlyakov, V.: Nonlinear approximation in finite dimensional spaces. J. Complex. 13, 489–508 (1997)