@article{CRMATH_2017__355_7_780_0,
     author = {Brezis, Ha{\"\i}m and G\'omez-Castro, David},
     title = {Rigidity of optimal bases for signal spaces},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {780--785},
     publisher = {Elsevier},
     volume = {355},
     number = {7},
     year = {2017},
     doi = {10.1016/j.crma.2017.06.004},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2017.06.004/}
}