@article{AA_2012_24_1_a0,
     author = {A. A. Vasilyeva},
     title = {Kolmogorov widths and approximation numbers of {Sobolev} classes with singular weights},
     journal = {Algebra i analiz},
     pages = {3--39},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2012_24_1_a0/}
}