@article{DAN_1979_245_6_a8,
     author = {L. N. Poltavskii},
     title = {Finite controllability of infinite systems of pendulums},
     journal = {Doklady Akademii Nauk},
     pages = {1318--1321},
     year = {1979},
     volume = {245},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_245_6_a8/}
}