Wertkarten Zahlungsverkehr Trends und Perspektiven auf dem Weg zur elektronischen Geldbörse Klein Stephan Heftet / 2012 / Tysk
Student Conference Proceedings 2019 8th Conference on Medical Engineering Science, 4th Conference on Medical Informatics, 2nd Conference on Biomedical Engineering, and 1st Conference on Auditory Technology Klein Stephan Heftet / 2019 / Tysk
Student Conference Proceedings 2020 9th Conference on Medical Engineering Science, 5th Conference on Medical Informatics, 3rd Conference on Biomedical Engineering, and 2nd Conference on Auditory Technology Buzug, Thorsten Heftet / 2020 / Engelsk
