@article{DAN_1971_200_6_a14,
     author = {P. E. Krasnushkin},
     title = {Qualitative investigation of radiowax-ray trajectories in a laminar medium by the method of phase trajectories},
     journal = {Doklady Akademii Nauk},
     pages = {1313--1316},
     publisher = {mathdoc},
     volume = {200},
     number = {6},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_200_6_a14/}
}