Santos-Martı´n F. Martı´n-Lo´pez B., Garcı´a-Llorente M., Aguado M., Benayas J., Montes C. (2013) Unraveling the Relationships between Ecosystems and Human Wellbeing in SpainPLoS ONE 8(9): e73249. http://www.plosone.org/article/info:doi/10.1371/journal.pone.0073249