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Spijkerman E. & Coesel P.F.M. 1996. Competition for phosphorus among planktonic desmid species in continuous flow culture. Journal of Phycology 32: 939-948.

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Spijkerman E. & Coesel P.F.M. 1998. Different response mechanisms of two planktonic desmid species (Chlorophyceae) to a single, saturating addition of phosphate. Journal of Phycology 34: 438-445

Spijkerman E. & Coesel P.F.M. 1998. Alkaline phosphatase activity in two planktonic desmid species and the possible role of an extracellular envelope. Freshwater Biology 39: 503-513

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