Chifflard, Peter, et al. “Surface Runoff of Horse Grazed Pasture – a Disregarded Hydrological Response Unit in Low Mountain Ranges”. DIE ERDE – Journal of the Geographical Society of Berlin, vol. 149, no. 2-3, Sept. 2018, pp. 76-85, https://www.die-erde.org/index.php/die-erde/article/view/383.