Doležal, J., Šrůtek, M. y Villar, L. 2004. Stand structure and regeneration of a mixed forest (Abies alba-Fagus sylvatica) in the Central Pyrenees, Ordesa National Park, Spain. Pirineos. 158-159, (dic. 2004), 3–26. DOI:https://doi.org/10.3989/pirineos.2004.v158-159.46.