%0 Journal Article %A Degano, Pierpaolo %A Gianni, Patrizia %T A normal form for restricted exponential functions %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 1989 %P 217-231 %V 23 %N 2 %I EDP-Sciences %U http://archive.numdam.org/item/ITA_1989__23_2_217_0/ %G en %F ITA_1989__23_2_217_0