„Upgrading Geographic Information Systems to Spatial Decision Support Systems“, Math. Comput. For. Nat. Res. Sci., Bd. 3, Nr. 1, S. Pages: 36–41 (6), Feb. 2011, Zugegriffen: Okt. 31, 2026. Verfügbar unter: https://tmp.mcfns.com/index.php/Journal/article/view/MCFNS.3-36