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