Rustiah, W., and S. Sulistyani. ‚ÄúDetermination of Zirconium(IV) Based on Flow Injection Analysis With The Xylenol Orange As A Complexing‚ÄĚ. Al-Kimia, Vol. 9, no. 2, Dec. 2021, pp. 141-50, doi:10.24252/al-kimia.v9i2.23638.