“Extraction of lanthanum (III) ion from aqueous solutions using Formazan reagent by liquid-liquid method”, TUJ-BA, vol. 45, no. 5, pp. 111–121, Nov. 2023, Accessed: May 05, 2026. [Online]. Available: https://journal.latakia-univ.edu.sy/index.php/bassnc/article/view/15624