As a general rule, the search division selects for citation only documents which are present in the search documentation or which it has access to in some other manner. In that way, no doubt exists about the contents of the documents cited, since the search division generally has physically inspected each document cited.
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/b_vi_6_1.htm
Date retrieved: 17 May 2021