@article{MZ_1931__33_168275,
     author = {W. A., Wenkov},
     title = {\"Uber die {Klassenanzahl} positiver bin\"arer quadratischer {Formen}},
     journal = {Mathematische Zeitschrift},
     pages = {350--374},
     publisher = {mathdoc},
     volume = {33},
     year = {1931},
     zbl = {57.0194.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1931__33_168275/}
}