Nicephorus of Constantinople
- Short biography of St. Nicephorus, linked to other saints with whom he was associated.
- http://www.saintpatrickdc.org/ss/0313.htm#nice

Nicephorus, Saint
- Short biographical entry in the Columbia Encyclopedia, 6th ed.
- http://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.
- http://www.newadvent.org/cathen/11050a.htm