%0 Journal Article %A K. Ishihara %T A Finite Element Lumped Mass Scheme for Solving Eigenvalue Problems of Circular Arches. %J Numerische Mathematik %D 1980 %P 267-290 %V 36 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1980__36_132702/ %F NUMA_1980__36_132702