%0 Journal Article
%A Köbler, Johannes
%A Schöning, Uwe
%A Wagner, Klaus W.
%T The difference and truth-table hierarchies for NP
%J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
%D 1987
%P 419-435
%V 21
%N 4
%I EDP-Sciences
%U http://www.numdam.org/item/ITA_1987__21_4_419_0/
%G en
%F ITA_1987__21_4_419_0