@article{Slyusarchuk_2007, title={Generalization of the Kneser theorem on zeros of solutions of the equation $y" + p (t) y = 0$}, volume={59}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/3332}, abstractNote={We obtain conditions of the oscillation of solutions of the equation $y" + p(t)Ay = 0$ in the Banach space, where $A$ is a bounded linear operator and $p : R_+ \rightarrow R_+$ is a continuous function.
<br><br>}, number={4}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Slyusarchuk, V. Yu.}, year={2007}, month={Apr.}, pages={571–576} }