Bertilsson, S., Berglund, O., Karl, D. M., & Chisholm, S. W. (2003). Elemental composition of marine Prochlorococcus and Synechococcus: Implications for the ecological stoichiometry of the sea. Limnology and Oceanography, 48(5), 1721–1731. Portico. https://doi.org/10.4319/lo.2003.48.5.1721