@article{ljs28087,
 author={A. Onu, M. and O. Okafor, J. and S. Kovo, A. and S. Mohammad, Y.},
 year={2016},
 title={Effect of acid modification on physicochemical characteristics of Kpautagi clay},
 journal={Leonardo J. Sci.},
 volume={15},
 number={28},
 pages={87-94},
 url={http://ljs.academicdirect.org/A28/087_094.pdf}
}