Inequalities for Convex and s-Convex Functions on   {\delta}=[a,b]$\times$[c,d]
  In this paper, two new lemmas are proved and inequalities are established for co-ordinated convex functions and co-ordinated s-convex functions. 
M. Emin Ozdemir, Havva Kavurmaci, Ahmet Ocak Akdemir, Merve Avci
math.CA math.NA