@article{SM_1970_12_2_a1,
     author = {A. P. Khromov},
     title = {Representation of arbitrary functions by certain special series},
     journal = {Sbornik. Mathematics},
     pages = {159--176},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {1970},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1970_12_2_a1/}
}