@article{MZ_1964__85_170309,
     author = {Bruno M\"uller},
     title = {Quasi-Frobenius-Erweiterungen.},
     journal = {Mathematische Zeitschrift},
     pages = {345--368},
     publisher = {mathdoc},
     volume = {85},
     year = {1964},
     zbl = {0203.04403},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__85_170309/}
}