@unpublished{stuehrenberg:2002a,
  author	= {St{\"u}hrenberg, Maik},
  title		= {Benefits of {XML} Learning Objects. {V}ortrag, 1st {I}nternational {I}{LIAS} conference, {H}amburg 5th and 6th {S}eptember},
  year		= {2002},
  URL		= {http://milca.sfs.uni-tuebingen.de/Publikationen/Ilias-LOM.ps}
}