@article{MZM_1975_18_6_a6,
     author = {A. A. Shkalikov},
     title = {A~system of functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {855--860},
     publisher = {mathdoc},
     volume = {18},
     number = {6},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1975_18_6_a6/}
}