%0 Journal Article %A E. D. Schwab %T Inverse semigroups generated by group congruences. The Möbius functions %J Algebra and discrete mathematics %D 2013 %P 116-126 %V 16 %N 1 %U http://geodesic.mathdoc.fr/item/ADM_2013_16_1_a12/ %G en %F ADM_2013_16_1_a12