“Even offline everything is under control - TraveNetz establishes mobile company information of VertiGIS; [Auch offline alles im griff - travenetz etabliert mobile betriebsauskunft der vertiGIS]” (2021) gis.Business | issn : 1869-9286, 22(1), pp. S4-S5. Available at: https://journal-gis.business/index.php/gisb/article/view/631 (Accessed: 8 November 2026).