H. T. . Salloom, T. K. . Hamad, and F. H. . Rajab, “Laser-Induced Breakdown Spectroscopy for Determination of Toxic Metals in Fertilizers: emphasis on Lead”, Iraqi Journal of Science, vol. 63, no. 6, pp. 2523–2531, Jun. 2022, doi: 10.24996/ijs.2022.63.6.19.