Joshua S. Valeta and  Marc C. Verdegem,  Nitrogen Dynamics and Removal by Algal Turf Scrubber under High Ammonia and Organic Matter Loading in a Recirculating Aquaculture System.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2012, vol. 71(11). 1043 - 1050
    [viewed 18 October 2019]. Available from: https://publications.waset.org/pdf/921.