1. Arnold, J. B., M. S. Klima, and P. J. Bethell. 2007. Designing the coal preparation plant of the future, 255. 1st ed. Colorado: SME.
2. Chemical Inspection and Regulation Service, http://www.cirs-reach.com/China_Chemical_Regulation/Regulations_on_Safe_Management_of_Hazardous_Chemicals_in_China.html last visit 2018.
3. Creaser, C. S., and A. M. C. Davies. 1988. Section 6: Chemometrics and data analysis, analytical applications of spectroscopy. Royal Society of Chemistry, London 403–80.