Adewale, Peter Sanjo, et al. “Determination of Heavy Metals Concentration in Soil and Leafy Vegetables in Urban Expressway and Peri-Urban Road Farms of Lagos State, Nigeria”. Journal of Sustainability and Environmental Management, vol. 1, no. 2, May 2022, pp. 241-6, doi:10.3126/josem.v1i2.45372.