<ref name="Lieth_&_Werger_1989">{{cite book |first1=H. |last1=Lieth |first2=M. J. A. |last2=Werger |year=1989 |title=Tropical rain forest ecosystems: biogeographical and ecological studies. Ecosystems of the world 14B |url= |location=Amsterdam |publisher=Elsevier |pages=xvii + 713 pp. |isbn=}}</ref>