Amir Mahmoudi,  Preparation and Physical Assessment of Portland Cement Base Composites Containing Nano Particles.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2015, vol. 99(3). 229 - 233
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/10000567.