%0 Journal Article %A Straubing, Howard %T Relational morphisms and operations on recognizable sets %J RAIRO. Informatique théorique %D 1981 %P 149-159 %V 15 %N 2 %I EDP-Sciences %U http://archive.numdam.org/item/ITA_1981__15_2_149_0/ %G en %F ITA_1981__15_2_149_0