@article{MZ_1994__217_1_174698,
     author = {Martin Epkenhans and Martin Kr\"uskemper},
     title = {On trace forms of \'etale algebras and field extensions.},
     journal = {Mathematische Zeitschrift},
     pages = {421--434},
     publisher = {mathdoc},
     volume = {217},
     number = {1},
     year = {1994},
     zbl = {0821.11024},
     url = {http://geodesic.mathdoc.fr/item/MZ_1994__217_1_174698/}
}