Acknowledgments
The Editors would like to express their sincere thanks and gratitude to the authors who submitted papers to this Special Issue, and, especially, the reviewers, who spent their valuable time on providing their detailed feedback. Without their help, it would have been impossible to prepare this Special Issue in line with the high standards set from the beginning.
The Editors would also like to acknowledge the support received from the MUSTEC project (https://mustec.eu), which provided the analytical framework for many of the papers included in this Special Issue. MUSTEC receives financing under the European Union’s Horizon 2020 research and innovation program, under the grant agreement No. 764626. The content of this Special Issue is the sole responsibility of its authors and editors and does not necessarily reflect the views of the European Commission.