Rodrigues, M. Ângelo, I. Q. Ferreira, S. L. Freitas, J. M. Pires, and M. P. Arrobas. “Self-Reseeding Annual Legumes for Cover Cropping in Rainfed Managed Olive Orchards”. Spanish Journal of Agricultural Research, Vol. 13, no. 2, May 2015, p. e0302, doi:10.5424/sjar/2015132-6252.