Bounds for solutions of a nonlinear differential equation of the third order Staněk, Svatoslav (1987) Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
Bounds for solutions of the equation [ p ( t ) x ' ] ' + q ( t ) x = h ( t , x , x ' ) Miloš Ráb (1975) Archivum Mathematicum
Branching of periodic orbits from Kukles isochrones. Toni, B. (1998) Electronic Journal of Differential Equations (EJDE) [electronic only]
Branching of periodic orbits in Hamiltonian and reversible systems Vanderbauwhede, André (1998) Proceedings of Equadiff 9