Zain-Ul-Abdin, and Anwar Khitab. 2021. “Effect of Pine Needle Fibers on Properties of Cementitious Mortars : Pine Needles-Reinforced Mortars”. Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences 57 (4):33-46. https://ppaspk.org/index.php/PPAS-A/article/view/441.