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Billiones, R.G.; Tackx, M.L.M.; Flachier, A.T.; Zhu, L.; Daro, M.H. (1999). Image analysis as a tool for measuring particulate matter concentrations and gut content, body size, and clearance rates of estuarine copepods: validation and application. J. Mar. Syst. 22: 179-194, more
Billiones, R.G. (1998). Spatio-temporal distribution of suspended particulate matter in the Scheldt estuary (Belgium) and interactions with mesozooplankton. PhD Thesis. Free University of Brussels: Laboratory for ecology and systematics: Brussel. 175 pp., more
Flachier Troya, A.L. (1995). Image analysis as a method for the study of particulate matter concentrations, zooplankton size and feeding in estuarine environment. MSc Thesis. Vrije Universiteit Brussel: Brussel. 46, app. pp., more
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