%0 Book Section %A Lousberg, P. %T Backward parabolic equations %B Analytic solutions of partial differential equations - Trento, 1981 %A Collectif %S Astérisque %D 1981 %P 213-221 %N 89-90 %I Société mathématique de France %U http://www.numdam.org/item/AST_1981__89-90__213_0/ %G en %F AST_1981__89-90__213_0