1. Fytinsyre og fytaseaktivitet i foderstoffer;Boisen;Meddelelse fra Statens Husdyrbrugsforsøg,1987
2. Phytate degradation in soaked and fermented barley and wheat (preliminary studies);Carlson;Nordic Agric. Res.,1999
3. The biological availability of phosphorus in feedstuffs for pigs;Cromwell;Pig News Inf.,1992
4. Total phosphorus, phytate-phosphorus and phytase activity in plant feedstuffs;Eeckhout;Anim. Feed Sci. Technol.,1994
5. Simple and rapid determination of phytase activity;Engelen;JAOAC,1994