BibTeX

@ARTICLE{iumj56019,
    author = "L. Markus and N. Wagner",
     title = "Stability Theorems for a Class of Nonlinear Servomechanisms",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 6,
      year = 1957,
     issue = 3,
     pages = "393--399",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj56019}{article}{
     author = {Markus, L.},
     author = {Wagner, N.},
      title = {Stability Theorems for a Class of Nonlinear Servomechanisms},
    journal = {Indiana Univ. Math. J.},
     volume = {6},
       year = {1957},
     number = {3},
      pages = {393 \ndash 399},
}