Villar, L., Aseginolaza, C., Gomez, D., Montserrat, .G., Romo, A. and Uribe, P. 1990. The Aragonese pre-Pyrenean beech forests: Phytosociology, phytotopography and conservation. Acta Botanica Malacitana. 15, (Dec. 1990), 283–295. DOI:https://doi.org/10.24310/abm.v15i.9311.