@article{AIHPC_2017__34_5_1215_0,
     author = {Casado-D{\'\i}az, Juan},
     title = {A characterization result for the existence of a two-phase material minimizing the first eigenvalue},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {1215--1226},
     publisher = {Elsevier},
     volume = {34},
     number = {5},
     year = {2017},
     doi = {10.1016/j.anihpc.2016.09.006},
     zbl = {1379.49044},
     mrnumber = {3742521},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2016.09.006/}
}