@article{10_4153_CMB_2013_012_4,
     author = {Alperin, Roger C. and Peterson, Brian L.},
     title = {Integral {Sets} and the {Center} of a {Finite} {Group}},
     journal = {Canadian mathematical bulletin},
     pages = {9--11},
     year = {2014},
     volume = {57},
     number = {1},
     doi = {10.4153/CMB-2013-012-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2013-012-4/}
}