@Article{hessd-5-1137-2008,
AUTHOR = {de Rooij, G. H.},
TITLE = {Thermodynamics of the hydraulic head, pressure head, and gravitational head in subsurface hydrology, and principles for their spatial averaging},
JOURNAL = {Hydrology and Earth System Sciences Discussions},
VOLUME = {5},
YEAR = {2008},
NUMBER = {3},
PAGES = {1137--1157},
URL = {http://www.hydrol-earth-syst-sci-discuss.net/5/1137/2008/},
ISSN = {1812-2108}
}