“Theoretical Foundations and Limitations of First-Difference and Within-Transformation Estimators in Static Panel Data Analysis” (2024) Applied Science, Engineering, and Technology Review: Innovations, Applications, and Directions, 14(9), pp. 1–19. Available at: https://librasophia.com/index.php/ASETR/article/view/2024-SEP-04 (Accessed: 4 August 2025).