@article{DAN_1980_252_6_a7,
     author = {N. K. Nikol'skii},
     title = {Bases of exponential functions and values of reproducing kernels},
     journal = {Doklady Akademii Nauk},
     pages = {1316--1320},
     publisher = {mathdoc},
     volume = {252},
     number = {6},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_252_6_a7/}
}