Quantifying competiveness in woody plants. - Grams, ,T..E. E.,.; Kozovits, ,A..R.,.; Reiter, ,I..M.,.; Winkler, ,J..B.,.; Sommerkorn, ,M.,.; Blaschke, ,H.,.; Häberle, ,K.-H.,.; and Matyssek, ,R.. (Plant Biology, 2002)