“Direct and Derivative Spectrometric Determination of Zn(II) In Natural Water Sample Blood Serum and Milk: A Simple and Sensitive Spectrophotometric Method for Zinc Determination in Biological and Environmental Samples”, JASRAE, vol. 15, no. 12, pp. 195–199, Dec. 2018, Accessed: Jun. 27, 2025. [Online]. Available: https://ignited.in/index.php/jasrae/article/view/9220