@article{10_4064_aa112_2_1,
     author = {Hong Bing Yu},
     title = {The number of $k$-sums of abelian groups of order $k$},
     journal = {Acta Arithmetica},
     pages = {103--107},
     publisher = {mathdoc},
     volume = {112},
     number = {2},
     year = {2004},
     doi = {10.4064/aa112-2-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa112-2-1/}
}