> You need `(require 'org-tempo)', then

   > #+begin_src emacs-lisp
   >     (tempo-define-template "org-display-bib"
   > 			   '("bibliographystyle:plain" n
   > 			     "bibliography:/home/oub/texmf/bibtex/bib/bibgraf.bib"  p n)
   > 			   "<b" "Insert bib" 'org-tempo-tags)
   > #+end_src

Thanks that works like charm.  However I have some more templates of
the form so I tried 


#+begin_src emacs-lisp

(tempo-define-template "org-display-bib"
			   '("bibliographystyle:plain" n
			     "bibliography:/home/oub/texmf/bibtex/bib/bibgraf.bib"  p n)
			   "<b" "Insert bib" 'org-tempo-tags)

(tempo-define-template "org-display-comentario"
		       '("* Comentarios Hoja ?" n
                         "| Documentación codigo | Explicación código | Ficheros matlab | Fichero MLX | Impresión |" p n
                         "|----------------------+--------------------+-----------------+-------------+-----------|" p n
                         "|                      |                    |                 |             |           |" p n)
			   "<c" "Insert comentario" 'org-tempo-tags)




#+end_src


But the second template to be expanded with <c does not work.

What do I miss?

Thanks