%0 Journal Article %A Adam Kubica %T The regularity of weak and very weak solutions of the Poisson equation on polygonal domains with mixed boundary conditions (part I) %J Applicationes Mathematicae %D 2004 %P 443-456 %V 31 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am31-4-6/ %R 10.4064/am31-4-6 %G en %F 10_4064_am31_4_6