Wittmer, Walter; Büttiker, Willi; Krupp, Friedhelm (1994). Fauna of Saudi Arabia. Pro Entomologia c/o Natural History Museum. p. 358. ISBN978-3-7234-0014-2. Retrieved 1 October 2011.
MEED. Economic East Economic Digest, ltd. January 1994. Retrieved 1 October 2011.