DRAGOMIR, S.S. and FEDOTOV, I. 1998. AN INEQUALITY OF GRUSS’ TYPE FOR RIEMANN-STIELTJES INTEGRAL AND APPLICATIONS FOR SPECIAL MEANS. Tamkang Journal of Mathematics. 29, 4 (Dec. 1998), 287–292. DOI:https://doi.org/10.5556/j.tkjm.29.1998.4257.