Żaba, Jerzy, and Krzysztof Gaidzik. “The Ngorongoro Crater As the Biggest Geotouristic Attraction of the Gregory Rift (Northern Tanzania, Africa) – Geotouristic Valorization, Touristic Development and Hazard”. Geotourism/Geoturystyka, no. 24-25: 47. Accessed May 7, 2024. https://journals.agh.edu.pl/geotour/article/view/934.