AUCTeX is a package for writing (La)TeX, ConTeXt, docTeX and TeXinfo in Emacs and XEmacs.

AUCTeX is an /XEmacs package for writing documents with LaTeX, TeX, ConTeXt, docTeX or Texinfo. It gives you syntax highlighting, code completion, and also includes preview-latex, which lets you generate and view PNG previews of parts the code directly (e.g. math) in the Emacs buffer.

For working with citations and cross-references AUCTeX works very well with .

One can get a hint of AUCTeX's capabilities by reading Useful shortcuts or key bindings or predefined commands for emacs+AUCTeX.