%0 Journal Article %A S. Joe %A Y. Yan %T A piecewise constant collocation method using cosine mesh grading for Symm's equation. %J Numerische Mathematik %D 1993 %P 423-434 %V 65 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1993__65_4_133743/ %F NUMA_1993__65_4_133743