@article{MZ_1951__55_169249,
     author = {Martin Eichler},
     title = {Die {\"Ahnlichkeitsklassen} indefiniter {Gitter.}},
     journal = {Mathematische Zeitschrift},
     pages = {216--252},
     publisher = {mathdoc},
     volume = {55},
     year = {1951},
     url = {http://geodesic.mathdoc.fr/item/MZ_1951__55_169249/}
}