@article{PORMA_1977__36_1_115296,
     author = {Chan, C.Y. and Young, E.C.},
     title = {Regular regions for parabolic and elliptic equations},
     journal = {Portugaliae mathematica},
     pages = {7--12},
     publisher = {mathdoc},
     volume = {36},
     number = {1},
     year = {1977},
     mrnumber = {0535217},
     zbl = {0402.35037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1977__36_1_115296/}
}