@article{SEDP_1999-2000____A19_0,
     author = {Popov, Georgi},
     title = {KAM {Tori} and {Quantum} {Birkhoff} {Normal} {Forms}},
     journal = {S\'eminaire Goulaouic-Schwartz},
     note = {talk:19},
     pages = {1--13},
     year = {1999-2000},
     publisher = {Centre de math\'ematiques Laurent Schwartz, \'Ecole polytechnique},
     zbl = {1056.37078},
     mrnumber = {1813182},
     language = {en},
     url = {https://www.numdam.org/item/SEDP_1999-2000____A19_0/}
}