1. Aminoff D, Morgan W T J and Watkins 1952 Studies in immuno-chemistry II: The action of dilute alkali on the N-acetylhexosamines and the specific blood-group mucoids. Biochem. J. 51, 379–388.
2. Bremner J M and Mulvaney R L 1978 Urease activity in soils. pp 149–196.In Soil Enzymes. Ed R G Burns. Academic Press, NY.
3. Dixon M and Webb E C 1964 Enzymes. Academic Press. New York, NY, 950 p.
4. Godoy G, Rodríguez-Kábana R and Morgan-Jones G 1982 Parasitism ofHeterodera glycines andMeloidogyne arenaria by fungi isolated from cysts ofH. glycines. Nematropica 12, 111–119.
5. Kimura A 1965 Studies on the enzyme from the digestive tract ofHelix peliomphala. Purification and physico-chemical properties of the chitinase from the digestive tract ofHelix peliomphala. Shikoku Acta Med. 21, 866–879.