@article{10_1090_S0894_0347_08_00610_3,
     author = {Cohen, Albert and Dahmen, Wolfgang and DeVore, Ronald},
     title = {Compressed sensing and best {\dh}‘˜-term approximation},
     journal = {Journal of the American Mathematical Society},
     pages = {211--231},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {2009},
     doi = {10.1090/S0894-0347-08-00610-3},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-08-00610-3/}
}