“Innovative navigation and GEO-Apps: Which way to the...; [Wo geht’s denn hier zur …]”, gis.Business | issn : 1869-9286, vol. 16, no. 1, pp. 31–34, Jan. 2015, Accessed: Nov. 09, 2026. Available: https://journal-gis.business/index.php/gisb/article/view/507