%0 Journal Article %A Descalço, L. %A Ruškuc, N. %T Properties of the subsemigroups of the bicyclic monoid %J Czechoslovak Mathematical Journal %D 2008 %P 311-330 %V 58 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_2008__58_2_a1/ %G en %F CMJ_2008__58_2_a1