%0 Journal Article %A Kostolanský, Eduard %T Comments on effective and unambiguous context-free languages %J Kybernetika %D 1969 %P 181-185 %V 5 %N 3 %U http://geodesic.mathdoc.fr/item/KYB_1969_5_3_a0/ %G en %F KYB_1969_5_3_a0