@article{GDZPPN002299569,
title = {Inequalities of Poincar\'e Type and Applications to Singular Elliptic Differential Operators.},
journal = {Mathematische Annalen},
volume = {179},
year = {1968},
pages = {305-316},
zbl = {0159.15701},
url = {http://dml.mathdoc.fr/item/GDZPPN002299569}
}
CLARK, C. Inequalities of Poincaré Type and Applications to Singular Elliptic Differential Operators.. Mathematische Annalen, Tome 179 (1968) pp. 305-316. http://gdmltest.u-ga.fr/item/GDZPPN002299569/