Recent results on oscillation of solutions of forced and perturbed nonlinear differential equations of even order. (English) Zbl 0361.34031

Stab. dyn. Syst., Theor. Appl., Proc. Conf. Miss. State Univ. 1975, 17-72 (1977).


34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations
34E10 Perturbations, asymptotics of solutions to ordinary differential equations