@article{SEDP_2006-2007____A8_0,
     author = {Helffer, Bernard},
     title = {Domaines nodaux et partitions spectrales minimales},
     journal = {S\'eminaire Goulaouic-Schwartz},
     note = {talk:8},
     pages = {1--21},
     year = {2006-2007},
     publisher = {Centre de math\'ematiques Laurent Schwartz, \'Ecole polytechnique},
     language = {fr},
     url = {https://www.numdam.org/item/SEDP_2006-2007____A8_0/}
}