@article{10_4064_sm159_1_7,
     author = {S. V. Konyagin and V. N. Temlyakov},
     title = {Convergence of greedy approximation {I.
}  {General} systems},
     journal = {Studia Mathematica},
     pages = {143--160},
     year = {2003},
     volume = {159},
     number = {1},
     doi = {10.4064/sm159-1-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm159-1-7/}
}