@article{MZM_1972_12_1_a3,
     author = {L. A. Leont'eva},
     title = {A property of a system of functions close to exponential functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {29--36},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_12_1_a3/}
}