Migoń, P. and Pijet-Migoń, E. (2021) “Not simply volcanoes – The Geoheritage of the Cretaceous System in the Land of the Extinct Volcanoes Geopark, West Sudetes (SW Poland)”, Geotourism/Geoturystyka, 17(1-2(60-61), pp. 3–22. doi: 10.7494/geotour.2020.60-61.3.