@article{CRMATH_2017__355_6_671_0,
     author = {Carvalho, Camille and Chesnel, Lucas and Ciarlet, Patrick Jr.},
     title = {Eigenvalue problems with sign-changing coefficients},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {671--675},
     publisher = {Elsevier},
     volume = {355},
     number = {6},
     year = {2017},
     doi = {10.1016/j.crma.2017.05.002},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2017.05.002/}
}