%0 Journal Article %A Stubbe, Joachim %T Linear stability theory of solitary waves arising from Hamiltonian systems with symmetry %J Portugaliae mathematica %D 1989 %P 17-32 %V 46 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1989__46_1_115646/ %G en %F PORMA_1989__46_1_115646