Burkhard Stiller, Eryk Schiller, Corinna Schmitt: An Overview of Network Communication Technologies for IoT; in: S. Ziegler, M. James (Edt.), "Handbook of Internet-of-Things", Springer, Cham, Switzerland, January 2021, pp 1-31. URL: https://files.ifi.uzh.ch/CSG/staff/schiller/stiller_iot_handbook21.pdf.