Acknowledgements

We acknowledge valuable help and support throughout the editorial process of the following people: Bashir Saad Alvi, Irina Bostan, Gufron Athokojaev, Marc Burdon, Mateusz $\L {}\textrm{ukomski,}$ Fabian Hargesheimer, Benjamin Wahlen.

Special thanks go to Ignatios Souvatzis for the technical support of the editing process.