H. A. Mahdi, K. W. Hameed, and A.-J. A. Ali, “ Extraction of Bovine Serum Albumin by Aqueous Two-Phase System Using PEG4000/Sodium Citrate and PEG8000/Sodium Phosphate”, alkej, vol. 19, no. 2, pp. 39–51, Jun. 2023, doi: 10.22153/kej.2023.04.001.