1. A note on stability by Schauder’s theorem;Burton;Funkcial. Ekvac.,2001
2. Stability for a nonlinear second order ODE;Moroşanu;Funkcial. Ekvac.,2005
3. Stability for a damped nonlinear oscillator;Moroşanu;Nonlinear Anal.,2005
4. On the stability of the zero solution of certain second order non-linear differential equations;Hatvani;Acta Sci. Math. (Szeged),1971
5. On the asymptotic behaviour of the solutions of (p(t)x′)′+q(t)f(x)=0;Hatvani;Publ. Math. Debrecen,1973