Ivo of Chartres - Also known as St. Yves or Yvo. Profile. www.catholic-forum.com/saints/sainti09.htm
Ivo of Chartres, Saint - Brief biographical entry in the Columbia Encyclopedia. www.bartleby.com/65/iv/IvoChart.html
St. Ivo of Chartres - Essay in the Catholic Encyclopedia on the life and writings of this bishop, who died in 1116. www.newadvent.org/cathen/08257a.htm
