%0 Journal Article %A Walter, Hermann K.-G. %T A simple proof of Valiant's lemma %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 1986 %P 183-190 %V 20 %N 2 %I AFCET - Gauthier-Villars %C Paris %U http://www.numdam.org/item/ITA_1986__20_2_183_0/ %G en %F ITA_1986__20_2_183_0