%0 Journal Article %A Buntrock, G. %A Drewes, F. %A Lautemann, C. %A Mossakowski, T. %T Some modifications of auxiliary pushdown automata %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 1991 %P 545-556 %V 25 %N 6 %I EDP-Sciences %U http://www.numdam.org/item/ITA_1991__25_6_545_0/ %G en %F ITA_1991__25_6_545_0