@article{10_4064_aa_59_2_105_121,
     author = {Jorge Morales},
     title = {The classification of pairs of binary quadratic forms},
     journal = {Acta Arithmetica},
     pages = {105--121},
     publisher = {mathdoc},
     volume = {59},
     number = {2},
     year = {1991},
     doi = {10.4064/aa-59-2-105-121},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-59-2-105-121/}
}