%0 Journal Article %A Weingartner, Andreas %T On the solutions of $\sigma (n) = \sigma (n + k)$ %J Journal of integer sequences %D 2011 %V 14 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/JIS_2011__14_5_a0/ %G en %F JIS_2011__14_5_a0