@article{SEDP_1998-1999____A12_0,
     author = {Petkov, Vesselin and Zworski, Maciej},
     title = {Variation de la phase de diffusion et distribution des r\'esonances},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:12},
     pages = {1--12},
     publisher = {Centre de math\'ematiques Laurent Schwartz, \'Ecole polytechnique},
     year = {1998-1999},
     zbl = {1061.35505},
     mrnumber = {1721330},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1998-1999____A12_0/}
}