@article{PMIHES_1998__S88__9_0, author = {Michel, Louis}, title = {Pr\'eface}, journal = {Publications Math\'ematiques de l'IH\'ES}, pages = {9--9}, publisher = {Institut des Hautes \'Etudes Scientifiques}, volume = {S88}, year = {1998}, language = {en}, url = {http://www.numdam.org/item/PMIHES_1998__S88__9_0/} }