Periodic Solutions of Superlinear Convex Autonomous Hamiltonian Systems. - George Dinca; Daniel Pasca (J. Glob. Optim., 2000)

Periodic orbits Near a heteroclinic Loop formed by One-Dimensional Orbit and a Two-Dimensional Manifold: Application to the charged Collinear Three-Body Problem. - Jaume Llibre; Daniel Pasca (Int. J. Bifurc. Chaos, 2007)

Some existence results on periodic solutions of nonautonomous second-order differential systems with (q, p)-Laplacian. - Daniel Pasca; Chun-Lei Tang (Appl. Math. Lett., 2010)

Infinitely many periodic solutions for a class of new superquadratic second-order Hamiltonian systems. - Chun Li; Ravi P. Agarwal; Daniel Pasca (Appl. Math. Lett., 2017)