WASET
    Mohammed H. Mohammed and  Mats Emborg and  Roland Pusch and  Sven Knutsson,  Packing Theory for Natural and Crushed Aggregate to Obtain the Best Mix of Aggregate: Research and Development.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2012, vol. 67(7). 479 - 485
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/793.