Khusainov, D. Ya. Investigation of the stability of linear differential-functional equations of retarded type by the method of Lyapunov functions. (Russian) Zbl 0718.34108 Differ. Uravn. 26, No. 9, 1645-1646 (1990). MSC: 34K20 34D20 34A30 PDF BibTeX XML Cite \textit{D. Ya. Khusainov}, Differ. Uravn. 26, No. 9, 1645--1646 (1990; Zbl 0718.34108)
Khusainov, D. Ya. Exponential decrease of the solutions of linear systems with deviating argument of neutral type. (Russian) Zbl 0712.34081 Differ. Uravn. 26, No. 9, 1647 (1990). MSC: 34K99 34A30 34C11 PDF BibTeX XML Cite \textit{D. Ya. Khusainov}, Differ. Uravn. 26, No. 9, 1647 (1990; Zbl 0712.34081)