%0 Journal Article %A Chan, C.Y. %A Young, E.C. %T Regular regions for parabolic and elliptic equations %J Portugaliae mathematica %D 1977 %P 7-12 %V 36 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1977__36_1_115296/ %G en %F PORMA_1977__36_1_115296