• [1] W. J. Coles, An oscillation criterion for second-order linear differential equations, Proc. Amer. Math Soc. 19 (1968), 755-759.
• [2] Philip Hartman, On non-oscillatory linear differential equations of second order, Amer. J. Math. 74 (1952), 389–400. MR 0048667 (14,50b)
• [3] H. C. Howard, Oscillation and nonoscillation criteria for 𝑦”(𝑥)+𝑓(𝑦(𝑥))𝑝(𝑥)=0, Pacific J. Math 12 (1962), 243–251. MR 0145150 (26 #2685)
• [4] Aurel Wintner, A criterion of oscillatory stability, Quart. Appl. Math. 7 (1949), 115–117. MR 0028499 (10,456a)
• [5] Z. Opial, Sur une critère d’oscillation des intégrales de l’équation différentielle (𝑄(𝑡)𝑥’)’+𝑓(𝑡)𝑥=0, Ann. Polon. Math. 6 (1959/1960), 99–104 (French). MR 0104876 (21 #3627)

Bibliography

[1]

W. J. Coles, An oscillation criterion for second-order linear differential equations, Proc. Amer. Math Soc. 19 (1968), 755-759.

[2]

P. Hartman, On non-oscillatory linear differential equations of second order, Amer. J. Math. 74 (1952), 389-400. MR 0048667 (14:50b)

[3]

H. C. Howard, Oscillation and nonoscillation criteria for Pacific J. Math. 12 (1962), 243-251. MR 0145150 (26:2685)

[4]

A. Wintner, A criterion of oscillatory stability, Quart. Appl. Math. 7 (1949) 115-117. MR 0028499 (10:456a)

[5]

Z. Opial, Sur un critere d'oscillation des integrales de l'equation differentielle , Ann. Polon. Math. 6 (1959), 99-104. MR 0104876 (21:3627)