@article{ljs18001,
 author={Abraham Bolarin, O. a. G.},
 year={2011},
 title={On Error Estimation in Runge-Kutta Methods},
 journal={Leonardo J. Sci.},
 volume={10},
 number={18},
 pages={1-10},
 url={http://ljs.academicdirect.org/A18/001_010.pdf}
}