@article{SM_1971_13_3_a4,
     author = {L. A. Leont'eva},
     title = {On completeness of a~system of functions that are close to power functions},
     journal = {Sbornik. Mathematics},
     pages = {400--418},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_13_3_a4/}
}