Media type: E-Article Title: Geomorphometric relief classification with the k-median method in the Silesian Upland, southern Poland Contributor: Szypuła, Bartłomiej; Wieczorek, Małgorzata Published: Springer Science and Business Media LLC, 2020 Published in: Frontiers of Earth Science, 14 (2020) 1, Seite 152-170 Language: English DOI: 10.1007/s11707-019-0765-9 ISSN: 2095-0209; 2095-0195 Origination: Footnote: