scholarly article by U. Ehret et al published 19 February 2014 in Hydrology and Earth System Sciences
author: Murugesu Sivapalan, Ciaran J. Harman, Axel Kleidon, Dingbao Wang, Ludovicus van Beek, Marc F. P. Bierkens, Juraj Parajka, Stanislaus J Schymanski, Günter Blöschl, Thorsten Wagener, Giuliano Di Baldassarre, H.C. Winsemius, Ulrike Scherer