@article{10_4064_aa_20_3_223_251,
     author = {Bill Dulin and Hubert Butts},
     title = {Composition of binary quadratic forms over integral domains},
     journal = {Acta Arithmetica},
     pages = {223--251},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {1972},
     doi = {10.4064/aa-20-3-223-251},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-20-3-223-251/}
}