Open Access Policy
The publisher provides immediate open access to its content on the principle of making the book freely available to the public to support a greater global exchange of knowledge. However, there are also books with closed access licensed under a CC BY-NC-SA license (https://creativecommons.org/licenses/by-nc-sa/4.0/), while books published with a closed scheme are licensed under a CC BY-SA license (https://creativecommons.org/licenses/by-sa/4.0/).