%0 Journal Article %A Rupert, C. P. %T Crossability of cancellative Kleene semigroups %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 1992 %P 151-161 %V 26 %N 2 %I EDP-Sciences %U http://www.numdam.org/item/ITA_1992__26_2_151_0/ %G en %F ITA_1992__26_2_151_0