Fractional calculus techniques and methods started to be applied successfully during the last decades in several fields of science and engineering. In this paper we studied the stability of fractional-order nonlinear time-delay systems for Riemann-Liouville and Caputo derivatives and we extended Razumikhin theorem for the fractional nonlinear time-delay systems.
"Razumikhin Stability Theorem for Fractional Systems with Delay." Abstr. Appl. Anal. 2010 1 - 9, 2010. https://doi.org/10.1155/2010/124812