Kodadadi, Mojtaba, and Ali Khodaii. “Evaluation of Low Temperature Cracking of Asphalt Mixture Modified With PPA Using Acoustic Emission Technique”. International Journal of Engineering & Technology, vol. 7, no. 4.20, Nov. 2018, pp. 541-5, https://doi.org/10.14419/ijet.v7i4.20.26415.