@incollection{AST_1992__210__217_0,
     author = {Ikawa, Mitsuru},
     title = {Singular perturbation of symbolic flows and the modified {Lax-Phillips} conjecture},
     booktitle = {M\'ethodes semi-classiques Volume 2 - Colloque international (Nantes, juin 1991)},
     series = {Ast\'erisque},
     pages = {217--235},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {210},
     year = {1992},
     language = {en},
     url = {http://archive.numdam.org/item/AST_1992__210__217_0/}
}