%0 Journal Article %A Ludwig Kohaupt %T Optimal L...-Error Estimates for Piecewise Linear Finite Elements in Irn for 1...n...3. %J Numerische Mathematik %D 1986 %P 353-362 %V 50 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1986__50_133159/ %G en %F NUMA_1986__50_133159