@article{00714613, title = {Convex functions and the Hadamard inequality.}, journal = {Revista Colombiana de Matem\'aticas}, volume = {28}, year = {1994}, pages = {7-12}, zbl = {0832.26015}, language = {en}, url = {http://dml.mathdoc.fr/item/00714613} }
Azpeitia, Alfonso G. Convex functions and the Hadamard inequality.. Revista Colombiana de Matemáticas, Tome 28 (1994) pp. 7-12. http://gdmltest.u-ga.fr/item/00714613/