@article{MOMA_1986__102_178296,
     author = {Werner Georg Nowak},
     title = {\"Uber die {Eulersche} {...-Funktion} in quadratischen {Zahlk\"orpern.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {169--174},
     publisher = {mathdoc},
     volume = {102},
     year = {1986},
     zbl = {0594.12001},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1986__102_178296/}
}