Belman Flores, Juan Manuel, and V. Pérez-García. “CO2 As Refrigerant: From the past to Future”. Acta Universitaria 23, no. 2 (April 30, 2013): 19–26. Accessed June 28, 2026. https://www.actauniversitaria.ugto.mx/index.php/acta/article/view/426.