Geodesic
The integral comparison and the disconjugacy of the solutions of second order linear equations
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 30 (1975) no. 4 
I. V. Kamenev. The integral comparison and the disconjugacy of the solutions of second order linear equations. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 30 (1975) no. 4. http://geodesic.mathdoc.fr/item/RM_1975_30_4_a11/
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Voir la notice de l'article provenant de la source Math-Net.Ru

[1] F. Xartman, Obyknovennye differentsialnye uravneniya, Mir, M., 1970 | MR

[2] V. A. Kondratev, “Dostatochnye usloviya nekoleblemosti i koleblemosti reshenii uravnenii $y''+p(x)y=0$”, DAN, 113:4 (1957)

[3] I. V. Kamenev, “Ob integralnom sravnenii dvukh lineinykh differentsialnykh uravnenii vtorogo poryadka”, UMN, 27:3(165) (1972), 199–200 | MR | Zbl

[4] I. V. Kamenev, “Metod integralnogo sravneniya v teorii obyknovennykh differentsialnykh uravnenii vtorogo poryadka”, Trudy MIEM, 24, 1971–1972

[5] I. V. Kamenev, “Integralnaya teorema sravneniya dlya nekotorykh sistem lineinykh differentsialnykh uravnenii”, Diff. uravneniya, 8:5 (1972)

[6] H. Howard, “Oscillation criteria for fourth-order linear differential equations”, Trans. Amer. Math. Soc., 96:2 (1960) | DOI | MR | Zbl