BibTeX

@ARTICLE{iumj53012,
    author = "J. Levin and Norman Levinson",
     title = "Singular Perturbations of Non-Linear Systems of Differential Equations and an Associated Boundary Layer Equation",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 3,
      year = 1954,
     issue = 2,
     pages = "247--270",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj53012}{article}{
     author = {Levin, J.},
     author = {Levinson, Norman},
      title = {Singular Perturbations of Non-Linear Systems of Differential Equations and an Associated Boundary Layer Equation},
    journal = {Indiana Univ. Math. J.},
     volume = {3},
       year = {1954},
     number = {2},
      pages = {247 \ndash 270},
}