1. Fettsäuremethylester, Umesterung mit Trimethylsulfoniumhydroxid (Schnellverfahren);Arens;Fat Science and Technology,1994
2. Barbera, G., Inglese, P., & Pimienta-Barrios, E. (1995). Agro-ecology, cultivation and uses of prickly pear. FAO Plant Production and Protection Paper 132.
3. Vegetable fats and oils;Bockisch,1998
4. Antioxidant activities of sicilian prickly pear (Opuntia ficus indica) fruit extracts and reducing properties of its betalains;Butera;Journal of Agricultural and Food Chemistry,2002
5. Use of the fruits and stems of the prickly pear cactus (Opuntia spp.) into human food;Dominguez-Lopez;Food Science and Technology International,1995