40 years riegl —hightech from austria; [40 Jahre Riegl – Hightech aus Österreich]. gis.Business | issn : 1869-9286 [Internet]. 2018 Jan. 1 [cited 2026 Nov. 8];19(1):24-30. Available from: https://journal-gis.business/index.php/gisb/article/view/398