@article{GDZPPN002362414,
title = {Approximation by Solutions of Elliptic Equations on Closed Subsets of Euclidean Space.},
journal = {Mathematica Scandinavica},
volume = {74},
year = {1994},
pages = {249-259},
zbl = {0835.35035},
url = {http://dml.mathdoc.fr/item/GDZPPN002362414}
}
Verdera, J.; Paramonov, P.V. Approximation by Solutions of Elliptic Equations on Closed Subsets of Euclidean Space.. Mathematica Scandinavica, Tome 74 (1994) pp. 249-259. http://gdmltest.u-ga.fr/item/GDZPPN002362414/