1. R. Bellman,Stability of Solutions of Differential Equations [Russian translation], Inostr. Lit., Moscow (1953).
2. C. Bandle and L. A. Pelletier, “Nonlinear elliptic problems with critical exponent in shrinking annuli,”Math. Ann.,280, 1–19 (1988).
3. F. S. Berezovskaya, “Emden-Fowler equation. A qualitative study,” Preprint, Pushchino, Deposited at VINITI No. 8070-74 (1974).
4. M. I. Gikhman and A. V. Skorokhod,Stochastic Differential Equations [in Russian], Naukova Dumka, Kiev (1968).
5. R. Z. Khasminsky,Stability of Systems of Differential Equations under Random Parametric Disturbances [in Russian], Nauka, Moscow (1969).