Peñas, J., J. Cabello, C. Oyonarte, and J. F. Mota. “Altitudinal Variation and Plant Diversity in Scrubslands: Sierra De Los Filabres (Almeria, Spain)”. Acta Botanica Malacitana, vol. 20, Dec. 1995, pp. 133-42, doi:10.24310/abm.v20i.8841.