On the Hadamard's inequality for convex functions on the co-ordinates in a rectangle from the plane
In [J. Math. Anal. Appl. 167, No. 1, 49-56 (1992; Zbl 0758.26014)] the author introduced some mappings in connection with Hadamard's inequality for convex functions on a real interval. Some inequalities for these mappings were also given. This paper contains similar results for functions defined on a rectangle and convex in the directions of the sides of it.
scientific article; zbMATH DE number 1743680