Fabian Kueffer: Characterization and Classifications of Blockchains using Softgoal Interdependency Graphs and Machine Learning; Universität Zürich, Communication Systems Group, Department of Informatics, Zürich, Switzerland, April 2021, URL: https://files.ifi.uzh.ch/CSG/staff/scheid/extern/theses/BA-F-Kueffer.pdf.