%0 Journal Article %A Pal, Janos %A Schlomiuk, Dana %T Summing up the Dynamics of Quadratic Hamiltonian Systems With a Center %J Canadian journal of mathematics %D 1997 %P 582-599 %V 49 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1997-027-0/ %R 10.4153/CJM-1997-027-0 %F 10_4153_CJM_1997_027_0