On the oscillation of solutions of self-adjoint linear differential equations of the fourth order

On the oscillation of solutions of self-adjoint linear differential equations of the fourth order
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Trans. Amer. Math. Soc. 89 (1958), 325-377

DOI: https://doi.org/10.1090/S0002-9947-1958-0102639-X

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References

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Differentialgleichungen, Lösungsmethoden und Lösungen

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