@article{01125926,
title = {On the regularity of elliptic differential equations using symmetry techniques and suitable discrete spaces.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {1996},
year = {1996},
zbl = {0885.35019},
language = {en},
url = {http://dml.mathdoc.fr/item/01125926}
}
Pflaum, Christoph. On the regularity of elliptic differential equations using symmetry techniques and suitable discrete spaces.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 1996 (1996) . http://gdmltest.u-ga.fr/item/01125926/