@article{DAN_1968_179_4_a1,
     author = {B. E. Veits},
     title = {Lacunary systems},
     journal = {Doklady Akademii Nauk},
     pages = {762--765},
     year = {1968},
     volume = {179},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_179_4_a1/}
}