@article{IM2_2009_73_6_a5,
     author = {E. D. Livshits},
     title = {Lower bounds for the rate of convergence of greedy algorithms},
     journal = {Izvestiya. Mathematics},
     pages = {1197--1215},
     year = {2009},
     volume = {73},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2009_73_6_a5/}
}