1. ^{{cite web|url=http://www.med.wright.edu/streams/applications/application.pdf|title=Research in Bagao|author=|publisher=Wright University|date=|accessdate=2010-11-17}}
2. ^{{cite web|url=http://www.nhm.ku.edu/rbrown/Rafes%20PDF%20publications/2002_Brown_Guttman_BiolJLinSoc.pdf|title=Phylogenetic systematics of the Rana signata complex of Philippine and Bornean stream frogs: reconsideration of Huxley’s modification of Wallace’s Line at the Oriental–Australian faunal zone interface|author=Rafe M. Brown and Sheldon I. Guttman|date=2002-02-22|accessdate=2010-11-17|archive-url=https://web.archive.org/web/20110721132118/http://www.nhm.ku.edu/rbrown/Rafes%20PDF%20publications/2002_Brown_Guttman_BiolJLinSoc.pdf|archive-date=2011-07-21|dead-url=yes|df=}}