BibTeX

@ARTICLE{iumj11009,
    author = "W. Loud",
     title = "An Eigenvalue Problem Related to Stability Questions in Perturbed Autonomous Systems",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 11,
      year = 1962,
     issue = 1,
     pages = "139--151",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj11009}{article}{
     author = {Loud, W.},
      title = {An Eigenvalue Problem Related to Stability Questions in Perturbed Autonomous Systems},
    journal = {Indiana Univ. Math. J.},
     volume = {11},
       year = {1962},
     number = {1},
      pages = {139 \ndash 151},
}