@article{AM2_1968__1_135993,
     author = {Helmut Hasse},
     title = {\"Uber die {Klassenzahl} des {K\"orpers} {P} (...) mit einer {Primzahl} p = 1 mod. 2 3. {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {316--316},
     publisher = {mathdoc},
     volume = {1},
     year = {1968},
     url = {http://geodesic.mathdoc.fr/item/AM2_1968__1_135993/}
}