@article{SM_2001_192_2_a6,
     author = {A. I. Rubinshtein},
     title = {On best convergence},
     journal = {Sbornik. Mathematics},
     pages = {277--297},
     publisher = {mathdoc},
     volume = {192},
     number = {2},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2001_192_2_a6/}
}