@article{CRMATH_2007__344_11_673_0,
     author = {Cravo, Gl\'oria},
     title = {Some matrix completion problems},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {673--676},
     publisher = {Elsevier},
     volume = {344},
     number = {11},
     year = {2007},
     doi = {10.1016/j.crma.2007.04.016},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2007.04.016/}
}