@article{DAN_1960_130_6_a11,
     author = {V. L. Kan and A. S. Kel'zon},
     title = {Stable and unstable trajectories in proportional navigation},
     journal = {Doklady Akademii Nauk},
     pages = {1220--1223},
     publisher = {mathdoc},
     volume = {130},
     number = {6},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_130_6_a11/}
}