@article{ljs28031,
 author={Abubakar, M. and Abdullahi, M. and I. Aguwa, J.},
 year={2016},
 title={Probability based design of concrete mixes with cow-bone ash admixed cement},
 journal={Leonardo J. Sci.},
 volume={15},
 number={28},
 pages={31-42},
 url={http://ljs.academicdirect.org/A28/031_042.pdf}
}