@article{10_4064_aa122_2_1,
     author = {Zhi-Hong Sun and Kenneth S. Williams},
     title = {On the number of representations of $n$ by $ax^2+bxy+cy^2$},
     journal = {Acta Arithmetica},
     pages = {101--171},
     publisher = {mathdoc},
     volume = {122},
     number = {2},
     year = {2006},
     doi = {10.4064/aa122-2-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa122-2-1/}
}