Nicephorus of Constantinople - Short biography of St. Nicephorus, linked to other saints with whom he was associated. users.erols.com/saintpat/ss/0313.htm#nice
Nicephorus, Saint - Short biographical entry in the Columbia Encyclopedia, 6th ed. www.bartleby.com/65/ni/NicephorSt.html
St. Nicephorus - Long article on the stormy career of the Patriarch of Constantinople, who died in 829. From the Catholic Encyclopedia. www.newadvent.org/cathen/11050a.htm
