Vervaeke, I., R. Delen, J. Wouters, R. Deroose, and M. de Proft. “Flower Biology of Six Cultivars of the Bromeliaceae II. Pollination and Fertilization”. Selbyana, vol. 24, no. 1, Feb. 2003, pp. 87-94, https://ojs.test.flvc.org/selbyana/article/view/121580.