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, pp. 3–26. doi: 10.3989/pirineos.2004.v158-159.46.