@article{Van_Loon_2012,
title={A process-based typology of hydrological drought},
volume={16},
ISSN={1607-7938},
url={http://dx.doi.org/10.5194/hess-16-1915-2012},
DOI={10.5194/hess-16-1915-2012},
number={7},
journal={Hydrology and Earth System Sciences},
publisher={Copernicus GmbH},
author={Van Loon,
A. F. and Van Lanen,
H. A. J.},
year={2012},
month=jul,
pages={1915–1946} }