“Intergraph invests in expensive technology initiative; [Intergraph Investiert in Aufwendige Technologie-Initiative]” (2011) gis.Business | issn : 1869-9286, 12(1), pp. 47–52. Available at: https://journal-gis.business/index.php/gisb/article/view/73 (Accessed: 9 November 2026).