Laser, Stefan, and Estrid Sørensen. “Re-Imagining River Restoration: Temporalities, Landscapes and Values of the Emscher Set in a Post-Mining Environment”. Berliner Blätter 84 (June 21, 2021): 21–34. Accessed May 17, 2024. http://www.berliner-blaetter.de/index.php/blaetter/article/view/1106.