1. APHA (American Public Health Association, American Water Works Association, Water Environment Federation). 1992. In:Standard methods for the examination of water and wastewater, 18th ed. (Ed. by A.E. Greenberg, L.S. Clesceri & A.D. Eaton). American Public Health Association, Washington, D.C. 1100 pp.
2. Bahls L. & Metzeltin D. 2012. Diatoms of the United States:Neidiopsis[online]. Boulder: University of Colorado. Available from: http://westerndiatoms.colorado.edu/taxa/genus/Neidiopsis [Accessed 1 June 2013].