Non-fragile tracking controller design for fractional order systems against active disturbance rejectionS. Arivumani, P. Vadivel, G. Rajchakit and T. SaravanakumarEur. Phys. J. Spec. Top., (2024) 1-17DOI: https://doi.org/10.1140/epjs/s11734-024-01217-z