@article{MZM_1968_3_2_a1,
     author = {A. A. Mirolubov},
     title = {On the completeness of a~system of functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {125--132},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1968_3_2_a1/}
}