Geodesic
On the instability of solutions of seventh order nonlinear delay differential equations
Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 1 (2011), pp. 60-65.

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A kind of seventh order nonlinear delay differential equations is considered. By using the Lyapunov–Krasovskii functional approach [5], some sufficient conditions are established which guarantee that the zero solution of the equation considered is unstable. Our conditions are new and supplement previously known results. 
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Cemil Tunç. On the instability of solutions of seventh order nonlinear delay differential equations. Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 1 (2011), pp. 60-65. https://geodesic-test.mathdoc.fr/item/BASM_2011_1_a5/

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