C. J. Crous, D. C. Drake, A. L. Jacobsen, R. B. Pratt, S. M. Jacobs, and K. J. Esler, “Foliar nitrogen dynamics of an invasive legume compared to native non-legumes in fynbos riparian zones varying in water availability”, WSA, vol. 45, no. 1 January, Jan. 2019.