The red edge position and shape as indicators of plant chlorophyll content and biomass.

Filella I, Peñuelas J (1994) The red edge position and shape as indicators of plant chlorophyll content and biomass. International Journal of Remote Sensing 15:1459-1470.

Effects of nutrient and water stress on leaf phenolic content of peppers and susceptibility to generalist herbivores (Helicoverpa armigera).

Estiarte M, Filella I, Serra J, Peñuelas J (1994) Effects of nutrient and water stress on leaf phenolic content of peppers and susceptibility to generalist herbivores (Helicoverpa armigera). Oecologia 99:392-396.