We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleDefining intractability: comparisons among published definitions.AuthorsBerg AT; Kelly MMPublicationEpilepsia, 2006, Vol 47, Issue 2, p431ISSN0013-9580Publication typearticleDOI10.1111/j.1528-1167.2006.00440.x