Oliet, J., R. Planelles, F. Artero, E. Martínez Montes, L. Álvarez-Linarejos, R. Alejano, and M. López Arias. 2003. “Root Growth Potential in Nursery Pinus Halepensis Mill. Seedlings. Fertilization Effect”. Forest Systems 12 (1), 51-60. https://doi.org/10.5424/787.