%0 Journal Article %A Diaz, J.B. %A Ram, R.B. %A Verma, G.R. %T Reflection principles for Laplace's equation when the boundary data involves derivatives of higher order %J Portugaliae mathematica %D 1983 %P 23-40 %V 42 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1983__42_1_115523/ %G en %F PORMA_1983__42_1_115523