Leung, Hau-yan, and Ramapillai V. Balendran. “Properties of Fresh Polypropylene Fibre Reinforced Concrete under the Influence of Pozzolans”. Journal of Civil Engineering and Management 9, no. 4 (December 31, 2003): 271-279. Accessed October 25, 2021. https://journals.vgtu.lt/index.php/JCEM/article/view/9063.