@article{10_4064_aa130_3_5,
     author = {Ay\c{s}e Alaca and \c{S}aban Alaca and Mathieu F. Lemire and Kenneth S. Williams},
     title = {Nineteen quaternary quadratic forms},
     journal = {Acta Arithmetica},
     pages = {277--310},
     publisher = {mathdoc},
     volume = {130},
     number = {3},
     year = {2007},
     doi = {10.4064/aa130-3-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa130-3-5/}
}