@article{DAN_1970_191_5_a19,
     author = {I. M. Vilensky},
     title = {On a non-linear effect in radio-wave propagation in the ionosphere},
     journal = {Doklady Akademii Nauk},
     pages = {1041--1043},
     publisher = {mathdoc},
     volume = {191},
     number = {5},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_5_a19/}
}