The use of third party material in this book does not indicate that it is also subject to the Creative Commons licence mentioned. If the material used is not subject to the aforementioned Creative Commons licence and the action in question is not permitted by law, the consent of the respective rights holder must be obtained for further use. Trademarks, company names, generally descriptive terms etc. used in this work may not be used freely. The rights of the respective rights holder must be observed and use is subject to the rules of trademark law, even without separate reference. This book is available as a free download from www.budrich.eu (https://doi.org/10.3224/84742698).