Afolabi, Lukmon Owolabi, et al. “Failure Mechanism of Two-Phase Syntactic Foam Polymer Composites under Different Coating Conditions”. International Journal of Integrated Engineering, vol. 11, no. 7, Nov. 2019, pp. 112-21, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5068.