A. N. Laghari, Z. A. Siyal, M. A. Soomro, D. K. Bangwar, A. J. Khokhar, and H. L. Soni, “Quality Analysis of Urea Plant Wastewater and its Impact on Surface Water Bodies”, Eng. Technol. Appl. Sci. Res., vol. 8, no. 2, pp. 2699–2703, Apr. 2018.