TY - JOUR AU - Alireza Ansari AU - Shiva Eshaghi AU - Reza Khoshsiar Ghaziani TI - Lyapunov-type inequality for nonlinear systems with Riemann-Liouville fractional derivatives JO - Novi Sad Journal of Mathematics PY - 2019 SP - 17 EP - 34 VL - 49 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.30755/NSJOM.07194/ DO - 10.30755/NSJOM.07194 ID - 10.30755/NSJOM.07194 ER -