Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1971_199_5_a8, author = {S. F. Prokoptsev}, title = {Some properties of linear combinations of functions close to exponential functions}, journal = {Doklady Akademii Nauk}, pages = {1018--1021}, publisher = {mathdoc}, volume = {199}, number = {5}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_199_5_a8/} }
S. F. Prokoptsev. Some properties of linear combinations of functions close to exponential functions. Doklady Akademii Nauk, Tome 199 (1971) no. 5, pp. 1018-1021. http://geodesic.mathdoc.fr/item/DAN_1971_199_5_a8/