Dostupné online http://www.heraldica.org/topics/france/frprince.htm Dostupné online The Rank/Title of Prince in France "French principalities" Over de verschillende prinsen van Oranje http://www.heraldica.org/topics/france/frprince.htm The Rank/Title of Prince in France http://www.heraldica.org/topics/france/frprince.htm French principalities A list of French Princes and Principalities Франсуа Вельде. Заметки о титуле принца во Франции