Afif-Khouri, E., Camara Obregon, M. A., Oliveira-Prendes, J. A., Gorgoso-Valera, J. J. and Canga-Libano, E. (2010) “Relationship among soil parameters, tree nutrition and site index of Pinus radiata D. Don in Asturias, NW Spain”, Forest Systems, 19(1), pp. 77-88. doi: 10.5424/fs/2010191-01169.