“Geomarketing in the era of social media; [Geomarketing im Zeitalter von Social Media]”, gis.Business | issn : 1869-9286, vol. 16, no. 1, pp. 146–148, Jan. 2015, Accessed: Nov. 08, 2026. Available: https://journal-gis.business/index.php/gisb/article/view/541