WASET
    Jozef Junak and  Nadezda Stevulova,  Substitution of Natural Aggregates by Crushed Concrete Waste in Concrete Products Manufacturing.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2015, vol. 101(5). 626 - 629
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/10001463.