[1]
Barnett, N.S. and Dragomir, S.S. 2001. Some inequalities for random variables whose probability density functions are absolutely continuous using a pre-Chebychev inequality. Tamkang Journal of Mathematics. 32, 1 (Mar. 2001), 55–60. DOI:https://doi.org/10.5556/j.tkjm.32.2001.369.