Notivol, E., L. A. Gil, and J. A. Pardos. “Wood Specific Gravity and Variability Estimation in Pinus Pinaster Ait, Trees”. Forest Systems 1, no. 1 (June 1, 1992): 41-47. Accessed August 3, 2026. https://fs.revistas.csic.es/index.php/fs/article/view/481.