On certain inequalities improving the Hermite-Hadamard inequality. Hussain, Sabir; Anwar, Matloob — 2007 JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]
Two inequalities of simpson type for quasi-convex functions and applications. Alomari, Mohammad; Hussain, Sabir — 2011 Applied Mathematics E-Notes [electronic only]