Putra VGV, Mohamad JN, Yusuf Y. A New Model to Calculate Stress Relaxation of Viscoelastic Material for Polyester-Wool-Spandex Yarn with Analytical Mechanics Approach. J. Penelit. Fis. Apl. [Internet]. 2021Dec.30 [cited 2024May7];11(2):94-105. Available from: https://journal.unesa.ac.id/index.php/jpfa/article/view/7071