@article{DAN_1991_318_1_a2,
     author = {V. P. Gromov},
     title = {Criteria for the convergence of series of exponentials in function},
     journal = {Doklady Akademii Nauk},
     pages = {20--23},
     publisher = {mathdoc},
     volume = {318},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_318_1_a2/}
}