Navarro, F., Gallego, F., Sánchez Anta, M.A., González Zapatero, M.A. and Elena Roselló, J.A. 1987. The sclerophyllous thorny communities of Aspargo Albi-Rhamnetum "bethurici" in the Ribadurian subsector. Acta Botanica Malacitana. 12, (Dec. 1987), 209–212. DOI:https://doi.org/10.24310/Actabotanicaabmabm.v12i.9747.