EDIT

//		DescriptionElementSource source = textData.getSources().iterator().next();

//		Reference ref = source.getCitation();

//		assertNotNull("Citation should not be null", ref);

//		assertEquals("Source author should be 'Meyer et. al.'", "Meyer et. al.",ref.getAuthorTeam().getTitleCache());

//		assertEquals("Publication title should be 'My first book'", "My first book", ref.getTitle());

//		assertEquals("Publication year should be '1987'", "1987", ref.getYear());

//		source = textData.getSources().iterator().next();

//		ref = source.getCitation();

//		assertNotNull("Citation should not be null", ref);

//		assertEquals("Source author should be 'Theys, A.'", "Theys, A.",ref.getAuthorTeam().getTitleCache());

//		assertEquals("Publication title should be 'The ultimate book'", "The ultimate book", ref.getTitle());

//		assertEquals("Publication year should be '2011'", "2011", ref.getYear());