A Comparison of a Priori Estimates of the Solutions of a Linear Fractional System with Distributed Delays and Application to the Stability Analysis. - Hristo Kiskinov; Magdalena Veselinova; Ekaterina Madamlieva; Andrey Zahariev (Axioms, 2021)

Hyers-Ulam and Hyers-Ulam-Rassias Stability for Linear Fractional Systems with Riemann-Liouville Derivatives and Distributed Delays. - Hristo Kiskinov; Ekaterina Madamlieva; Andrey Zahariev (Axioms, 2023)