@article{GDZPPN002346559,
title = {A Problem for Elliptic Partial Differential Operators Defined on an Arbitrary Open Set.},
journal = {Mathematica Scandinavica},
volume = {9},
year = {1961},
pages = {185-196},
zbl = {0118.31102},
url = {http://dml.mathdoc.fr/item/GDZPPN002346559}
}
Wallin, N.O. A Problem for Elliptic Partial Differential Operators Defined on an Arbitrary Open Set.. Mathematica Scandinavica, Tome 9 (1961) pp. 185-196. http://gdmltest.u-ga.fr/item/GDZPPN002346559/