BibTeX

@ARTICLE{iumj17062,
    author = "Norman Shenk",
     title = "The Invariance of Wave Operators Associated with Perturbations of",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 17,
      year = 1968,
     issue = 11,
     pages = "1005--1021",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj17062}{article}{
     author = {Shenk, Norman},
      title = {The Invariance of Wave Operators Associated with Perturbations of},
    journal = {Indiana Univ. Math. J.},
     volume = {17},
       year = {1968},
     number = {11},
      pages = {1005 \ndash 1021},
}