I. J. Ansorge, J. V. Durgadoo, and A. M. Treasure, “Sentinels to climate change. The need for monitoring at South Africa’s Subantarctic laboratory”, S. Afr. J. Sci., vol. 110, no. 1/2, pp. 1–4, Dec. 2017, doi: 10.1590/sajs.2014/a0044.