Vitoldas Vaitkevičius and  Evaldas Šerelis,  Influence of Silica Fume on Ultrahigh Performance Concrete.   journal   = {International Journal of Bioengineering and Life Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 85(1). 37 - 42
    [viewed 20 November 2019]. Available from: https://publications.waset.org/pdf/9997039.