Kaminski, Michael A., et al. “The Paleozoic Formations of the Al Qassim Province in Saudi Arabia As Potential Sites for Geotourism”. Geotourism/Geoturystyka, no. 3–4 (58–59), Feb. 2021, p. 1, https://doi.org/10.7494/geotour.2019.58-59.1.