A spatial model of tree 'alfa'-diversity and tree density for the Amazon - Steege, Hans Ter; Pitman, Nigel; Sebatier, Daniel; Castellanos, Hernan; Van Der Hout, Peter; Dally, Douglas C.; Silveira, Marcos; Phillips, Oliver; Vasquez, Rodolfo; Van Andel, Tinde; Duivenvoorden, Joost; Oliveira, Alexandre Adalardo; et al. (Biodiversity and Conservation, 2003)