Negro, C., L. De Bellis, E. Sabella, E. Nutricati, A. Luvisi, and A. Miceli. “Detection of Not Allowed Food-Coloring Additives (copper Chlorophyllin; Copper-Sulphate) in Green Table Olives Sold on the Italian Market”. Advances in Horticultural Science, vol. 31, no. 4, Dec. 2017, pp. 225-33, doi:10.13128/ahs-20814.