@article{MAN_1928__99_159246,
     author = {Ph. Furtw\"angler},
     title = {\"Uber die simultane {Approximation} von {Irrationalzahlen.} {Zweite} {Mitteilung}},
     journal = {Mathematische Annalen},
     pages = {71--83},
     publisher = {mathdoc},
     volume = {99},
     year = {1928},
     zbl = {54.0212.03},
     url = {http://geodesic.mathdoc.fr/item/MAN_1928__99_159246/}
}