Melgar, J.C., Syvertsen, J.P. and Garcia-Sanchez, F. 2008. Can elevated CO2 improve salt tolerance in olive trees? Journal of Plant Physiology 165: 631-640.

Sebastiani, L., Minnocci, A. and Tognetti, R. 2002. Genotypic differences in the response to elevated CO2 concentration of one-year-old olive cuttings (Olea europaea L. cv. Frantoio and Moraiolo). Plant Biosystems 136: 199-208.

Tognetti, R., Sebastiani, C., Vitagliano, C., Raschi, A. and Minnocci, A. 2001. Responses of two olive tree (Olea europaea L.) cultivars to elevated CO2 concentration in the field. Photosynthetica 39: 403-410.