%0 Journal Article %A Olexandr Ganyushkin %A Ivan Livinsky %T Length of the inverse symmetric semigroup %J Algebra and discrete mathematics %D 2011 %P 64-71 %V 12 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ADM_2011_12_2_a5/ %G en %F ADM_2011_12_2_a5