关于奇异二阶微分方程（Φ（X’））’＋f（t，X）＝0的某些可解准则

刘希玉

Some Existence Principles for the Singular Second Order Differential Equation(Ф(x'))' + f(t, x) = 0

数学学报 . 1996, (3): . DOI: 10.12386/A1996sxxb0057