@article{ASENS_2008_4_41_4_513_0,
     author = {Hitrik, Michael and Sj\"ostrand, Johannes},
     title = {Rational invariant tori, phase space tunneling, and spectra for non-selfadjoint operators in dimension $2$},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {513--573},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {Ser. 4, 41},
     number = {4},
     year = {2008},
     doi = {10.24033/asens.2075},
     zbl = {1171.35131},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/asens.2075/}
}