Hennig, Sabine, Fritz Zobl, and Wolfgang W. Wasserburger. “Accessible Web Maps for Visually Impaired Users: Recommendations and Example Solutions”. Cartographic Perspectives, no. 88 (November 7, 2017): 6–27. Accessed April 25, 2024. https://cartographicperspectives.org/index.php/journal/article/view/cp88-pr.