1. Martynyuk, A.A. and Martynyuk-Chernienko, Yu.A., Analysis of Trajectories of Nonlinear Dynamics: Estimates for Solutions and Comparison Principle, Differ. Uravn., 2012, vol. 48, no. 10, pp. 1395–1403.
2. Martynyuk, A.A., Stability of a Set of Trajectories of Nonlinear Dynamics, Dokl. Math., 2007, vol. 75, pp. 385–389.
3. Plotnikov, A.V. and Skrypnik, N.V., Differentsial’nye uravneniya s “chetkoi” i nechetkoi mnogoznachnoi pravoi chast’yu. Asimptoticheskie metody (Differential Equations with “Fuzzy” and “Unfuzzy” Set-Valued Right-Hand Side. Asymptotic Methods), Odessa, 2009.
4. Laksmikantham, V., Bhaskar, T.G., and Devi, J.V., Theory of Set Differential Equations in Metric Spaces, Cambridge, 2006.
5. Laksmikantham, V., Leela, S., and Martynyuk, A.A., Stability Analysis of Nonlinear Systems, New York, 1989.