1. Stability Theory of Differential Equations;Bellman,1954
2. Differential and Integral Inequalities;Walter,1970
3. On the conditions of the oscillation and non-oscillation of solutions of a nonlinear second order differential equation;Izjumova;Differencial'nye Uravnenija,1966
4. A remark on the oscillations of solutions of the system of ordinary differential equations;Mirzov;Soobšč. Akad. Nauk Gruzin. SSR,1971
5. On the oscillations of solutions of the system of nonlinear differential equations;Mirzov;Differencial'nye Uravnenija,1973