%0 Journal Article %A Póvoas, M. %T Boundary control of a symmetric hyperbolic system with nonlinear boundary conditions %J Portugaliae mathematica %D 1982 %P 393-403 %V 41 %N 1-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1982__41_1-4_115511/ %G en %F PORMA_1982__41_1-4_115511