Azizi, M. A., and A. K. Ariffin. “Peridynamic Model for Nonlinear Viscoelastic Creep and Creep Rupture of Polypropylene”. Journal of Mechanical Engineering and Sciences, vol. 13, no. 4, Dec. 2019, pp. 5735-52, doi:10.15282/jmes.13.4.2019.02.0458.