Professor Angela Slavova holds a PhD in Mathematics, and is Full Professor at the Institute of Mathematics and Informatics at the Bulgarian Academy of Sciences, where she also serves as Head of the Department of Differential Equations and Mathematical Physics. She has been a Visiting Professor at numerous universities in various countries, and has participated in more than 30 conferences, workshops and seminars as an invited speaker. She has more than 100 publications in journals on applied mathematics to her credit, and she has written and co-written three monographs. Professor Pietro Zecca is Full Professor in the Department of Mathematics and Computer Science at the University of Florence, Italy. He served as a Director of the International Mathematical Summer Center (CIME) from 2001 to 2014. Professor Zecca has been a Visiting Professor at numerous universities in various countries and has participated in more than 40 conferences, workshops and seminars in the field of differential equations and control theory as an invited lecturer. He has published more than 120 journal articles on differential equations and nonlinear analysis, and he has written and co-written three monographs.