@article{CMJ_2009__59_3_a20,
     author = {Alaca, Ay\c{s}e and Alaca, \c{S}aban and Williams, Kenneth S.},
     title = {Evaluation of the sums $\sum\limits_{\substack{m=1 \\ m\equiv a\pmod 4}}^{n-1} \sigma (m) \sigma (n-m) $},
     journal = {Czechoslovak Mathematical Journal},
     pages = {847--859},
     publisher = {mathdoc},
     volume = {59},
     number = {3},
     year = {2009},
     mrnumber = {2545660},
     zbl = {1204.11009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2009__59_3_a20/}
}