@article{KJM_2015_39_2_a10,
     author = {B. Meftah and K. Boukerrioua and T. Chiheb},
     title = {New {Hadamard's} inequality for $\left( s_1,s_2\right)$-preinvex functions on co-ordinates},
     journal = {Kragujevac Journal of Mathematics},
     pages = {231 },
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KJM_2015_39_2_a10/}
}