Geodesic
On the non-stability of differential equation systems in case of small integral perturbations
Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 1 (1989), pp. 27-32.

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The problem of non-stability of the systems of non-linear stationary differential equations is considered when perturbating forces of small integral act on the system during finite time interval. Sufficient and necessary conditions are defined, when the linear differential equation systems are stable due to acting forces. Sufficient conditions are defined tor linear differential systems in case of which the system is non-stable for acting forces. 
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M. S. Gabrielyan; S. G. Shahinyan. On the non-stability of differential equation systems in case of small integral perturbations. Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 1 (1989), pp. 27-32. http://geodesic.mathdoc.fr/item/UZERU_1989_1_a4/

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