WASET
    B.S.Boyanov and  M.P.Sandalski and  K.I.Ivanov,  Zinc Sulfide Concentrates and Optimization of their Roasting in Fluidezed Bed Reactor.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2011, vol. 49(1). 46 - 52
    [viewed 05 May 2024]. Available from: https://publications.waset.org/pdf/2158.