@article{SM_1973_19_4_a2,
     author = {A. M. Lukatskii},
     title = {Series expansion in a~system of rational functions},
     journal = {Sbornik. Mathematics},
     pages = {531--545},
     year = {1973},
     volume = {19},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_19_4_a2/}
}