On the construction of a C 2 -counterexample to the Hamiltonian Seifert conjecture in ℝ 4 . Ginzburg, Viktor L.; Gürel, Basak Z. — 2002 Electronic Research Announcements of the American Mathematical Society [electronic only]
On the existence and non-existence of closed trajectories for some Hamiltonian flows. Viktor L. Ginzburg — 1996 Mathematische Zeitschrift
Some remarks on symplectic actions of compact groups. Viktor L. Ginzburg — 1992 Mathematische Zeitschrift