code: private List<String> parseReference(String reference) {
  		List<String> references = new ArrayList<String>();
  		Matcher matcher = REFERENCE_PATTERN.matcher(reference);
  		while (matcher.find()) {
  			references.add(matcher.group(1));
  		}
  		return references;
  	}
docs: Parses the references (such as RFC document) associated to a mime type. One or several references can be
  associated to a mime type. Each reference is encompassed by this pattern [ ].