%0 Journal Article %A Alireza Ansari %A Shiva Eshaghi %A Reza Khoshsiar Ghaziani %T Lyapunov-type inequality for nonlinear systems with Riemann-Liouville fractional derivatives %J Novi Sad Journal of Mathematics %D 2019 %P 17 - 34 %V 49 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.30755/NSJOM.07194/ %R 10.30755/NSJOM.07194 %F 10.30755/NSJOM.07194