@article{IM2_1981_16_1_a9,
     author = {A. M. Sedletskii},
     title = {Excesses of systems of exponential functions},
     journal = {Izvestiya. Mathematics},
     pages = {191--205},
     year = {1981},
     volume = {16},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1981_16_1_a9/}
}