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Hajo Schulz (2016), "Bei Anruf Abzocke", c’t Magazin (in German), vol. 2016, no. 26, p. 64, archived from the original on July 9, 2022, retrieved February 4, 2020
Jens Tönnesmann (December 8, 2016), "Die Weltvernetzer", Die Zeit (in German), p. 34, archived from the original on October 21, 2021, retrieved February 4, 2021
Robert Landgraf (September 13, 2019), "Reifeprüfung Börsengang", Handelsblatt (in German), archived from the original on January 23, 2023, retrieved February 4, 2020
"Das Einhorn von Göppingen", Handelsblatt (in German), January 7, 2017, archived from the original on July 14, 2017, retrieved February 4, 2020
About TeamViewer (in German), Rossmanith GmbH, archived from the original on April 19, 2005, retrieved February 4, 2020
Larissa Holzki, Christof Kerkmann, Effy Zhang (June 5, 2020), "Per Mausklick in die Firma", Handelsblatt (in German), p. 27, archived from the original on June 4, 2020, retrieved February 4, 2020{{citation}}: CS1 maint: multiple names: authors list (link)
Hajo Schulz (2016), "Bei Anruf Abzocke", c’t Magazin (in German), vol. 2016, no. 26, p. 64, archived from the original on July 9, 2022, retrieved February 4, 2020
Jens Tönnesmann (December 8, 2016), "Die Weltvernetzer", Die Zeit (in German), p. 34, archived from the original on October 21, 2021, retrieved February 4, 2021