-import eu.etaxonomy.cdm.model.reference.Article;
-import eu.etaxonomy.cdm.model.reference.Book;
-import eu.etaxonomy.cdm.model.reference.BookSection;
-import eu.etaxonomy.cdm.model.reference.CdDvd;
-import eu.etaxonomy.cdm.model.reference.Database;
-import eu.etaxonomy.cdm.model.reference.Generic;
-import eu.etaxonomy.cdm.model.reference.InProceedings;
-import eu.etaxonomy.cdm.model.reference.Journal;
-import eu.etaxonomy.cdm.model.reference.Patent;
-import eu.etaxonomy.cdm.model.reference.PersonalCommunication;
-import eu.etaxonomy.cdm.model.reference.PrintSeries;
-import eu.etaxonomy.cdm.model.reference.Proceedings;
-import eu.etaxonomy.cdm.model.reference.ReferenceBase;
+import eu.etaxonomy.cdm.model.reference.Reference;
+import eu.etaxonomy.cdm.model.reference.ReferenceFactory;