Reference

Wilhelm Barthlott, Stefan Porembski, Manfred Kluge, Jörn Hopke, Loki [Hannelore] Schmidt (1997): Selenicereus wittii (Cactaceae): an epiphyte adapted to Amazonian Igapö inundation forests – Österreichische Botanische Zeitschrift = Plant Systematics and Evolution – 206: 175 - 185.