Copyright

All tables and figures are, if not otherwise stated, created by the author. Figure 3.3 (page 26) was created based on a graphic originally uploaded by “Thirunavukkarasye-Raveendran” under the Attribution 4.0 International (CC BY 4.0) license, see: https://commons.wikimedia.org/wiki/File:Zahlenstrahl_v1_02-11-2016_PD.svg