%0 Journal Article %A Jan Chabrowski %T On the Neumann problem for systems of elliptic equations involving homogeneous nonlinearities of a critical degree %J Colloquium Mathematicum %D 2011 %P 115-127 %V 125 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm125-1-8/ %R 10.4064/cm125-1-8 %G en %F 10_4064_cm125_1_8