@article{10_4064_aa147_1_5,
     author = {Zhi-Hong Sun},
     title = {On the number of representations of $n$ by $ax^2+by(y-1)/2$,
 $ax^2+by(3y-1)/2$ and $ax(x-1)/2+by(3y-1)/2$},
     journal = {Acta Arithmetica},
     pages = {81--100},
     publisher = {mathdoc},
     volume = {147},
     number = {1},
     year = {2011},
     doi = {10.4064/aa147-1-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa147-1-5/}
}