Antimony

References

1. Ph.D. Natalia Petrovskaya. Fundamentals of the theory of flotation, 2007

2. https://en.wikipedia.org/wiki/Heavy_metals

3. http://www.minfind.com/mineral-10647.html

4. http://forexaw.com/TERMs/Raw_materials/Other_extractive_materials/l989_%D0%A6%D0%B2%D0%B5%D1%82%D0%BD%D1%8B%D0%B5_%D0%BC%D0%B5%D1%82%D0%B0%D0%BB%D0%BB%D1%8B_Non-ferrous_metal_%D1%8D%D1%82%D0%BE