@article{GDZPPN002051214,
title = {Ueber fastperiodische ebene Bewegungen.},
journal = {Commentarii mathematici Helvetici},
volume = {4},
year = {1932},
pages = {51-64},
zbl = {0005.06304},
url = {http://dml.mathdoc.fr/item/GDZPPN002051214}
}
Bohr, Harald. Ueber fastperiodische ebene Bewegungen.. Commentarii mathematici Helvetici, Tome 4 (1932) pp. 51-64. http://gdmltest.u-ga.fr/item/GDZPPN002051214/