Journal article (2009) - J Tempelhoff (author) , H Hoag (author) , J Ur (author) , P van Dam (author) , M Melosi (author) , V Winiwarter (author) , T Wilkinson (author) , M. W. Ertsen (author) , E Arnold (author) , M Bender (author) , K Berry (author) , C Fort (author) , D Pietz (author) , M Musemwa (author) , M Nakawo (author)