1. Inhibition of urease by silver ions;Ambrose;J. Am. chem Soc.,1951
2. Fertilizing process and composition;Anderson,1969
3. A study of the inhibitory influence of Ag+, Au3+, and Cu2+ ions on the decomposition of urea by soyabean (glycine soja) urease;Bahadur,1962
4. Fertilizers in 2000 A.D;Cooke,1969
5. Extraction and colorimetric determination of urea in soils;Douglas,1970