@article{GDZPPN00118461X,
title = {Fourth order eigenvalue approximation by extrapolation on domains with reentrant corners.},
journal = {Numerische Mathematik},
volume = {58},
year = {1990},
pages = {631-640},
zbl = {0695.65064},
url = {http://dml.mathdoc.fr/item/GDZPPN00118461X}
}
Qun, Lin. Fourth order eigenvalue approximation by extrapolation on domains with reentrant corners.. Numerische Mathematik, Tome 58 (1990) pp. 631-640. http://gdmltest.u-ga.fr/item/GDZPPN00118461X/