@article{DAN_1995_342_2_a4,
     author = {A. M. Sedletskii},
     title = {Systems of exponentials with a separable real spectrum that are},
     journal = {Doklady Akademii Nauk},
     pages = {165--166},
     publisher = {mathdoc},
     volume = {342},
     number = {2},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_342_2_a4/}
}