Editors. "The False Dmitri appears in Poland". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15576, accessed 23 May 2013.]
The False Dmitri, a young man who claimed to be a son of Tsar Ivan IV, appears in Poland where he gathers supporters for an invasion of Russia.