Certain comparisons of Iyengar-Mahajani’s and Kesava Menon’s
integral inequalities with Hermite-Hadamard-Jensen’s integral inequalities are
considered and some mistakes in the paper [On certain inequalities by Iyengar
and Kesava Menon, Octogon Math. Mag. 4 (1996), no. 1, 9–11.] are corrected.
Some applications of these inequalities to elementary functions are carried out
and several inequalities involving mean values are obtained.