@article{MZM_1972_12_6_a3,
     author = {A. A. Mirolyubov},
     title = {The completeness of a functional sequence},
     journal = {Matemati\v{c}eskie zametki},
     pages = {671--680},
     publisher = {mathdoc},
     volume = {12},
     number = {6},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_12_6_a3/}
}