%0 Journal Article %A Klaus Madlener %A Jürgen Avenhaus %T String Matching And Algorithmic Problems In Free Groups. %J Revista colombiana de matematicas %D 1980 %P 1-16 %V 14 %I mathdoc %U http://geodesic.mathdoc.fr/item/RCM_1980__14_181690/ %F RCM_1980__14_181690