@article{RCM_1994_28_1_a1,
     author = {ALFONSO G. AZPEITIA},
     title = {Convex functions and the {Hadamard} inequality},
     journal = {Revista colombiana de matematicas},
     pages = {7--12},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {1994},
     url = {http://geodesic.mathdoc.fr/item/RCM_1994_28_1_a1/}
}