Attiah, Waad Samir, and Mountajab Al-Hasan. “Stress–temperature Equations of Motion of Ignaczak and Beltrami–Michell Types in Arbitrary Curve Coordinate System”. Journal of natural sciences, life and applied sciences 4, no. 4 (December 30, 2020): 110–91. Accessed December 20, 2025. https://ajsrp.ojsexpert.com/index.php/jnslas/article/view/3157.