Márquez-García, F., González-Sánchez, E. J., Castro-García, S., & Ordóñez-Fernández, R. (2013). Improvement of soil carbon sink by cover crops in olive orchards under semiarid conditions. Influence of the type of soil and weed. Spanish Journal of Agricultural Research, 11(2), 335-346. https://doi.org/10.5424/sjar/2013112-3558