Sanford, George. Katyn and the Soviet massacre of 1940. - London : Routledge. - 2005 - Merridale, Catherine (. The @Russian review. - London : Wiley-Blackwell, 1941-. - Online-Ressource. - ISSN 1467-9434. - DOI 10.1111/(ISSN)1467-9434 65, 2006)