Rowe, J.G. and Egea, J.M. 1988. Lichens of the Grazalema Natural Park. I) Silicicolous. Acta Botanica Malacitana. 13, (Dec. 1988), 279–289. DOI:https://doi.org/10.24310/Actabotanicaabmabm.v13i.9437.