Electronic Journal of Differential Equations, Vol. 2005(2005), No. 98, pp. 1-7. Title: Wirtinger-Beesack integral inequalities Author: Gulomjon M. Muminov (Andijon State Univ., Uzbekistan) Abstract: A uniform method of obtaining various types of integral inequalities involving a function and its first or second derivative is extended to integral inequalities involving a function and its third derivative Submitted April 22, 2005. Published September 19, 2005. Math Subject Classifications: 26D10. Key Words: Integral inequality; absolutely continuous function.