@article{SEDP_1984-1985____A12_0,
     author = {Petkov, V. M.},
     title = {Propri\'et\'es g\'en\'eriques des rayons r\'efl\'echissants et applications aux probl\`emes spectraux},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:12},
     pages = {1--15},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1984-1985},
     mrnumber = {819778},
     zbl = {0597.35092},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1984-1985____A12_0/}
}