Márcia Afonso and  Marisa Dinis-Almeida and  Cristina Fael,  Use of Cellulosic Fibres in Double Layer Porous Asphalt.   journal   = {International Journal of Urban and Civil Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2018, vol. 141(9). 810 - 816
    [viewed 24 January 2022]. Available from: https://publications.waset.org/pdf/10009463.