Timelike trajectories with fixed energy under a potential in static spacetimes. Germinario, Anna — 2006 International Journal of Mathematics and Mathematical Sciences
Trajectories connecting two submanifolds on a non-complete Lorentzian manifold. Bartolo, Rossella; Germinario, Anna; Sánchez, Miguel — 2004 Electronic Journal of Differential Equations (EJDE) [electronic only]