@article{MAN_1939__116_160021,
     author = {G. Bradistilov},
     title = {\"Uber periodische {Bewegungen} des n-fachen {Pendels} in der {Ebene}},
     journal = {Mathematische Annalen},
     pages = {602--609},
     year = {1939},
     volume = {116},
     zbl = {0020.31605},
     url = {http://geodesic.mathdoc.fr/item/MAN_1939__116_160021/}
}