BibTeX

@ARTICLE{iumj2999,
    author = "Ye-Lin Ou and Frederick Wilhelm",
     title = "Horizontally homothetic submersions and nonnegative curvature",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 56,
      year = 2007,
     issue = 1,
     pages = "243--262",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "53C20; 53C21;",
}

amsrefs

\bib{iumj2999}{article}{
     author = {Ou, Ye-Lin},
     author = {Wilhelm, Frederick},
      title = {Horizontally homothetic submersions and nonnegative curvature},
    journal = {Indiana Univ. Math. J.},
     volume = {56},
       year = {2007},
     number = {1},
      pages = {243 \ndash 262},
}