@article{CRMATH_2008__346_5-6_257_0,
     author = {Belkacem Bendiffalah},
     title = {Sur la non-universalit\'e des couples exacts},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {257--260},
     publisher = {Elsevier},
     volume = {346},
     number = {5-6},
     year = {2008},
     doi = {10.1016/j.crma.2008.02.001},
     language = {fr},
}