import eu.etaxonomy.cdm.validation.annotation.NullOrNotEmpty;\r
\r
/**\r
- * The upmost (abstract) class for references (information sources). Its two\r
- * direct subclasses {@link StrictReferenceBase StrictReferenceBase} and {@link BibtexReference BibtexReference}\r
- * allow either on the one side to handle different kind of references with their\r
- * peculiarities or on the other side to follow the flat BibTeX format\r
- * (see "http://en.wikipedia.org/wiki/BibTeX").\r
+ * The upmost (abstract) class for references (information sources). \r
* <P>\r
* This class corresponds to: <ul>\r
* <li> PublicationCitation according to the TDWG ontology\r