@unpublished{
    ogr:11:format,
    author = "Ogrodniczuk, Maciej",
    note = "Internal description of the Multiservice format",
    pdf = "http://nlp.ipipan.waw.pl/Bib/ogr:11:format.pdf",
    title = "{The Packaged TEI P5-based Stand-off Annotation Format}",
    year = "2011"
}