Belkadi, Mustapha, and Arezki Smaili. “Comparative Study Between Precooled Claude Liquefaction Cycle and an Active Magnetic Regeneration Cycle Applied to Hydrogen Liquefaction”. ENP Engineering Science Journal 1, no. 2 (December 31, 2021): 9–16. Accessed December 18, 2025. //enpesj.enp.edu.dz/index.php/enpesj/article/view/12.