Bassey, F., Iwegbue, C., Obi-Iyeke, G., Tesi, G., Rotu, A., Gobe, O. and Tsafe, A. (2014) “Heavy Metals in Soils and Tomatoes Grown in Urban Fringe Environment in Asaba, Delta State, Nigeria”, Nigerian Journal of Basic and Applied Sciences, 22(1-2), pp. 27–31. doi: 10.4314/njbas.v22i1-2.5.