@article{MZ_1994__216_4_174662,
     author = {Rudolf Scharlau},
     title = {Unimodular lattices over real quadratic fields.},
     journal = {Mathematische Zeitschrift},
     pages = {437--452},
     publisher = {mathdoc},
     volume = {216},
     number = {4},
     year = {1994},
     zbl = {0807.11021},
     url = {http://geodesic.mathdoc.fr/item/MZ_1994__216_4_174662/}
}