@article{MZ_1961__76_169951,
     author = {Hermann K\"unneth},
     title = {Zu einem {Satz} von {Hjelmslev} \"uber monotone {Bogen.}},
     journal = {Mathematische Zeitschrift},
     pages = {199--208},
     publisher = {mathdoc},
     volume = {76},
     year = {1961},
     zbl = {0097.38101},
     url = {http://geodesic.mathdoc.fr/item/MZ_1961__76_169951/}
}