“Intergeo 2021 Hybrid in Hanover - Geocommunity Meets Live and Digitally; [Intergeo 2021 Hybrid in Hannover - Die Geocommunity Trifft Sich Live Und Digital]”. Gis.Business | Issn : 1869-9286, vol. 22, no. 1, Jan. 2021, pp. 56-57, https://journal-gis.business/index.php/gisb/article/view/646.