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@article{MAN_1968__176_161697, author = {C. CLARK}, title = {Inequalities of {Poincar\'e} {Type} and {Applications} to {Singular} {Elliptic} {Differential} {Operators.}}, journal = {Mathematische Annalen}, pages = {305--316}, publisher = {mathdoc}, volume = {176}, year = {1968}, zbl = {0159.15701}, url = {http://geodesic.mathdoc.fr/item/MAN_1968__176_161697/} }
C. CLARK. Inequalities of Poincaré Type and Applications to Singular Elliptic Differential Operators.. Mathematische Annalen, Tome 176 (1968), pp. 305-316. http://geodesic.mathdoc.fr/item/MAN_1968__176_161697/