Miritoiu, Cosmin Mihai, Adrian Sorin Roșca, and Dragoș Tutunea. “Mechanical Properties of Composites Reinforced With Recycled Paper and Pine Needles Using Polymer Matrices Containing 50 to 70% Dammar Resin ”. BioResources 20, no. 2 (April 8, 2025): 3884–3909. Accessed October 17, 2025. https://ojs.bioresources.com/index.php/BRJ/article/view/24553.