%0 Journal Article %A Rannacher, R. %A Wendland, W. L. %T On the order of pointwise convergence of some boundary element methods. Part I. Operators of negative and zero order %J ESAIM: Modélisation mathématique et analyse numérique %D 1985 %P 65-87 %V 19 %N 1 %I AFCET - Gauthier-Villars %C Paris %U http://archive.numdam.org/item/M2AN_1985__19_1_65_0/ %G en %F M2AN_1985__19_1_65_0