@article{MAN_1907__64_158330,
     author = {Ernst Jacobsthal},
     title = {Vertauschbarkeit transfiniter {Ordnungszahlen}},
     journal = {Mathematische Annalen},
     pages = {475--488},
     publisher = {mathdoc},
     volume = {64},
     year = {1907},
     zbl = {38.0097.03},
     url = {http://geodesic.mathdoc.fr/item/MAN_1907__64_158330/}
}