@article{DAN_1968_181_2_a17,
     author = {O. E. Shushpanov},
     title = {Quasioptical lines with bounded non-equidistant correctors},
     journal = {Doklady Akademii Nauk},
     pages = {324--326},
     publisher = {mathdoc},
     volume = {181},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_2_a17/}
}