Rahmatullah, R., R. W. Putri, B. Mahendra, H. T. Arofi, and C. S. Hadi. “Catalyst Lifetime Analysis for High-Temperature Shift Converter (104-D1) at Urea Factory”. CHEESA: Chemical Engineering Research Articles, vol. 6, no. 2, Nov. 2023, pp. 76-84, doi:10.25273/cheesa.v6i2.15986.76-84.