BibTeX

@ARTICLE{iumj25028,
    author = "Marvin Marcus",
     title = "Higher Order Differences and Differentials for Functions in Sobolev Spaces",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 25,
      year = 1976,
     issue = 4,
     pages = "321--326",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj25028}{article}{
     author = {Marcus, Marvin},
      title = {Higher Order Differences and Differentials for Functions in Sobolev Spaces},
    journal = {Indiana Univ. Math. J.},
     volume = {25},
       year = {1976},
     number = {4},
      pages = {321 \ndash 326},
}