Csurhes, Steve. 2008. Plant pest risk assessment: Glush weed, Hygrophila costata. Biosecurity Queensland [Australia], Department of Primary Industries and Fisheries. 6 pp.
Online details: https://www.daf.qld.gov.au/__data/assets/pdf_file/0016/62323/IPA-Glush-Weed-Risk-Assessment.pdf