@article{PORMA_1989__46_1_115646,
     author = {Stubbe, Joachim},
     title = {Linear stability theory of solitary waves arising from {Hamiltonian} systems with symmetry},
     journal = {Portugaliae mathematica},
     pages = {17--32},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {1989},
     mrnumber = {0996398},
     zbl = {0687.35088},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1989__46_1_115646/}
}