Castaño-Meneses, G., J. G. García-Franco, and J. G. Palacios-Vargas. “Spatial Distribution Patterns of Tillandsia Violacea (Bromeliaceae) and Support Trees in an Altitudinal Gradient from a Temperate Forest in Central Mexico”. Selbyana, vol. 24, no. 1, Feb. 2003, pp. 71-77, https://journals.flvc.org/selbyana/article/view/121578.