Dr. Ivanka Stamova is a Professor of Mathematics at the University of Texas, San Antonio, TX, USA. She has authored numerous articles on nonlinear analysis, stability, and control of nonlinear systems, as well as three books, Functional and Impulsive Differential Equations of Fractional Order: Qualitative Analysis and Applications (2017), Applied Impulsive Mathematical Models (2016), and Stability Analysis of Impulsive Functional Differential Equations (2009). Her current research interests include qualitative analysis of nonlinear dynamical systems, fractional-order systems and models, impulsive control, and applications. Dr. Gani Stamov is a Professor of Instruction at the University of Texas, San Antonio, TX, USA. His current research interests include nonlinear analysis, applied mathematics, control theory, and uncertain nonlinear systems. He has authored over 150 articles, as well as three books, Functional and Impulsive Differential Equations of Fractional Order: Qualitative Analysis and Applications (2017), Applied Impulsive Mathematical Models (2016), and Almost Periodic Solutions of Impulsive Differential Equations (2012).