@Article{hess-13-905-2009,
AUTHOR = {van der Zaag, P. and Gupta, J. and Darvis, L. P.},
TITLE = {HESS Opinions "Urgent water challenges are not sufficiently researched"},
JOURNAL = {Hydrology and Earth System Sciences},
VOLUME = {13},
YEAR = {2009},
NUMBER = {6},
PAGES = {905--912},
URL = {http://www.hydrol-earth-syst-sci.net/13/905/2009/},
DOI = {10.5194/hess-13-905-2009}
}