Introductory article by the Editor-in-chief

Licence

(c) Copyright Valeria A. Andreeva 2020

Ce travail est disponible sous licence Creative Commons Attribution - Pas d’Utilisation Commerciale 4.0 International.

The work is provided under the terms of the Public Offer and of Creative Commons public license Creative Commons Attribution 4.0 International (CC BY 4.0).

This license permits an unlimited number of users to copy and redistribute the material in any medium or format, and to remix, transform, and build upon the material for any purpose, including commercial use.

This license retains copyright for the authors but allows others to freely distribute, use, and adapt the work, on the mandatory condition that appropriate credit is given. Users must provide a correct link to the original publication in our journal, cite the authors' names, and indicate if any changes were made.

Copyright remains with the authors. The CC BY 4.0 license does not transfer rights to third parties but rather grants users prior permission for use, provided the attribution condition is met. Any use of the work will be governed by the terms of this license.