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African Journal of Ecology > 59 > 2 > 342 - 349
2009 IEEE International Geoscience and Remote Sensing Symposium > 5 > V-393 - V-396
Biodiversity and Conservation > 2009 > 18 > 8 > 2043-2061
Biodiversity and Conservation > 2006 > 15 > 11 > 3751-3767
Agriculture, Ecosystems and Environment > 2001 > 87 > 3 > 299-307
Hydrobiologia > 1997 > 354 > 1-3 > 151-156