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Literatur
Beesack, P. R.: Nonoscillation and disconjugacy in the complex domain. Trans. Amer. Math. Soc.81, 211–242 (1956).
Hille, E.: Oscillation theorems in the complex domain. Trans. Amer. Math. Soc.23, 350–385 (1922).
Kamke, E.: Über die definiten selbstadjungierten Eigenwertaufgaben bei gewöhnlichen linearen Differentialgleichungen. Math. Z.45, 759–787 (1939).
Nehari, Z.: On the zeros of solutions of second-order linear differential equations. Amer. J. Math.76, 689–697 (1954).
Schwarz, B.: Disconjugacy of complex differential systems. Trans. Amer. Math. Soc.125, 482–496 (1966).
Taam, C. T.: Nonoscillation and comparison theorems of linear differential equations with complex-valued coefficients. Portugal. Math.12, 57–72 (1953).
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Herold, H. Nullstellen und kritische Stellen der Lösungen von Differentialgleichungen 2. Ordnung im Komplexen. Math Z 108, 269–284 (1969). https://doi.org/10.1007/BF01112533
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DOI: https://doi.org/10.1007/BF01112533