%0 Journal Article %A Ko, Ker-I %T A note on separating the relativized polynomial time hierarchy by immune sets %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 1990 %P 229-240 %V 24 %N 3 %I EDP-Sciences %U http://www.numdam.org/item/ITA_1990__24_3_229_0/ %G en %F ITA_1990__24_3_229_0