Gersende Georg Brigitte Séroussi Jacques Bouaud Extending the GEM model to support knowledge extraction from textual guidelines. 79-87 2005 74 I. J. Medical Informatics 2-4 http://dx.doi.org/10.1016/j.ijmedinf.2004.07.006 db/journals/ijmi/ijmi74.html#GeorgSB05