VANĚK, Michal, Igor ČERNÝ, Jakub PITŘÍK, and Tomáš KUBICA. “Comparison of Enterprises Extracting Building Materials in the Czech Republic”. GeoScience Engineering 66, no. 2 (June 29, 2020): 84–94. Accessed April 26, 2024. http://geoscience.cz/ojs/index.php/GSE/article/view/301.