Aliyu, M., Oladipo, M. O. A., Adeyemo, D. J., Nasiru, R., and Bello, S., “Quantitative determination of heavy metals around schools and automobile workshops near frequented roads in Kaduna State, Nigeria”, USci, vol. 1, no. 2, pp. 164–173, Dec. 2022, doi: 10.56919/usci.1222.022.