Sarah Taher Y. Al- lami, Ali A. F. Al- Hamadani. “Systematic Review for Comparison Type of Pulse Tube Refrigerator”. International Journal of Intelligent Systems and Applications in Engineering 11, no. 4s (February 13, 2023): 625–633. Accessed July 22, 2024. https://ijisae.org/index.php/IJISAE/article/view/2740.