3Greiner P,, Konietzny U. Phytase for food application. Food Technol. Biotechnol., 2006 (44): 125 - 140.
4Haefner S, Knietsch A, Scholten E, Braun,et al. Biotechnological production and applications of phytases. Appl. Microbiol. Biotechnol., 2005 (68) 588 - 597.
9[2]Ir Mia Eeckhout.Phytase quality suffers from steam pelleting and storage temperature[J].feed technology,1999,4(2):18-21.
10[8]Chang-Chih Chen,Ching_tsan Hunag,Kou_joan Cheng.Improvement of phytase thermostability by using sorghum liquor wastes supplemented with starch[J].Biotechnology Letters,2001,23:331-333.