%0 Journal Article %A Brandstadt, Andreas %T Closure properties of certain families of formal languages with respect to a generalization of cyclic closure %J RAIRO. Informatique théorique %D 1981 %P 233-252 %V 15 %N 3 %I EDP-Sciences %U http://www.numdam.org/item/ITA_1981__15_3_233_0/ %G en %F ITA_1981__15_3_233_0