1. Handling and spreading of fertilizers Part 1: Physical properties of fertilizer in relation to particle motion;Hofstee;Journal of Agricultural Engineering Research,1990
2. International Organization for Standardization ISO 565 Test sieves, woven metal wire cloth, perforated plate and electroformed sheet, nominal sizes of openings. Geneva: International Organization of Standardization.
3. International Organization for Standardization ISO 3310/1 Test sieves, technical requirements and testing-Part 1: Test sieves of metal wire cloth. Geneva: International Organization for Standardization.
4. Standard specification for wire-cloth sieves testing purposes;American Society for Testing Materials ASTM E11-87,1990
5. Physical properties of fertilizers and methods for measuring them;Hoffmeister,1979