@article{CRMATH_2004__338_6_461_0,
     author = {Castro-Jim\'enez, Francisco Jes\'us and Ucha-Enr{\i}́quez, Jos\'e Mar{\i}́a},
     title = {Quasi-free divisors and duality},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {461--466},
     publisher = {Elsevier},
     volume = {338},
     number = {6},
     year = {2004},
     doi = {10.1016/j.crma.2004.01.006},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2004.01.006/}
}