1. Singular quadratic functionals;Leighton;Trans. Amer. Math. Soc.,1936
2. Oscillation theory for second order linear, half-linear, superlinear and sublinear dynamic equations;Agarwal,2002
3. Asymptotic integrations of nonoscillatory second order differential equations;Chen;Trans. Amer. Math. Soc.,1991
4. Half-linear differential equations;Došlý,2005
5. Ordinary differential equations;Hartman,2002