Martini, D., Pacheco-Labrador, J., Perez‑Priego, O., van der Tol, C., El-Madany, T. S., Julitta, T., et al. (2019). Nitrogen and phosphorus effect on sun-induced fluorescence and gross primary productivity in mediterranean grassland. Remote Sensing, 11(21): 2562. doi:10.3390/rs11212562.