@article{GDZPPN001179446,
title = {A Finite Element Lumped Mass Scheme for Solving Eigenvalue Problems of Circular Arches.},
journal = {Numerische Mathematik},
volume = {46},
year = {1985},
pages = {499-504},
zbl = {0561.73067},
url = {http://dml.mathdoc.fr/item/GDZPPN001179446}
}
Ishihara, Kazuo. A Finite Element Lumped Mass Scheme for Solving Eigenvalue Problems of Circular Arches.. Numerische Mathematik, Tome 46 (1985) pp. 499-504. http://gdmltest.u-ga.fr/item/GDZPPN001179446/