1. A.O.C.S. (1993): Sampling and analysis of commercial fats and oils. Chlorophyll pigments. Am. Oil Chem. Soc, Cc 13d-55.
2. Hadorn, H. & Zürcher, K. (1974): Zur Bestimmung der Oxidations-stabilität von Ölen und Fetten. Lebensm.-Rundsck, 70, 57-60.
3. ISO (1977): Animal and vegetable fats and oils. Determination of peroxide value. International Standards Organization 3960.
4. ISO (1989): Animal and vegetable fats and oils. Determination of ultraviolet absorbance expressed as UV extinction. International Standards Organization 3656.
5. ISO (1996): Animal and vegetable fats and oils. Determination of acid value and acidity. International Standards Organization 660.