1. Short Protocols in Molecular Biology;Ausubel,1995
2. Specificity of milk-clotting enzymes towards bovine κ-casein;Drohse;Biochim. Biophys. Acta,1989
3. Studies on mold protease.I Purification, crystallization and some enzymatic properties of acid protease of Rhizopus chinensis;Fukumoto;Agric. Biol. Chem.,1967
4. Rennet: Current trends and future research;Garg;Food Rev. Int.,1994
5. Guoxin, T. 2005. Characteristics of Rhizopus milk-clotting enzyme in jiu-yao and studies on texture of kou wan lao. PhD Thesis. China Agric. Univ., Beijing.