Editors. "Marie de' Medici, Queen Mother of France, challenges her son's power". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15828, accessed 10 December 2013.]
Marie de' Medici, Queen Mother of France, allies herself with the Duc d'Epernon to challenge the power of her son Louis XIII.