Mohammed Ali, Marwa Hussein, et al. “Isotherms and Kinetics Study for Adsorption of Nitrogen from Air Using Zeolite Li-LSX to Produce Medical Oxygen”. Iraqi Journal of Chemical and Petroleum Engineering, vol. 24, no. 2, June 2023, pp. 81-87, https://doi.org/10.31699/IJCPE.2023.2.9.