1. Adler, G., 1971. Kartoffeln und Kartoffelerzeugnisse (Potatoes and potato products), Verlag Paul Parey, Berlin, Hamburg.
2. American Association of Cereal Chemistry (AACC), 1993a. Approved method 44-60 (Moisture-drying on quartz sand). The Association, St. Paul, MN.
3. American Association of Cereal Chemistry (AACC), 1993b. Approved method 44-15A (Moisture-air oven methods). The Association, St. Paul, MN.
4. Anonymous, 1967. VO 228/1967.Official Journal of the European Union 10: 136/1967 (28.06.1967).
5. Anonymous, 1999. VO 2718/1999.Official Journal of the European Union 42: L327/37 (21.12.1999).