@article{ASENS_1996_4_29_6_737_0,
     author = {Petkov, Vesselin and Stoyanov, Latchezar},
     title = {Singularities of the scattering kernel for trapping obstacles},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {737--756},
     publisher = {Elsevier},
     volume = {Ser. 4, 29},
     number = {6},
     year = {1996},
     doi = {10.24033/asens.1752},
     mrnumber = {97k:35187},
     zbl = {0887.35114},
     language = {en},
     url = {http://archive.numdam.org/articles/10.24033/asens.1752/}
}