(10)It should be recognised that cross-referring to information might be useful to the investor but it is essential that the key investor information document should contain all information necessary for the investor to understand the essential elements of the UCITS. If cross-references to sources of information other than the prospectus and periodic reports are used, it should be made clear that the prospectus and periodic reports are the primary sources of additional information for investors, and the cross-references should not downplay their significance.