Nikephoros is briefly mentioned by John Skylitzes in his "Synopsis of Histories", which covers the events of 811–1057, but is referenced far more in Skylitzess "Continuatus". Although Skylitzes is a contemporary source, his "Continuatus" was written under Alexios, who he is known to have been favorable to; however, he generally follows the more objective account of Attaleiates, who was one of his main sources. Nikephoros Bryennius the Youngers "Material for a History" chiefly relies on the testimonies of his contemporaries, including his father, Nikephoros Bryennios the Elder, and Alexios himself; however, it also relies on the works of Attaleiates, Psellos, and Skylitzes. Nikephoros Bryennioss bias in favor of Alexios and against Nikephoros III is inevitable as a result of being married to Alexioss daughter, and the fact that his father was blinded by Nikephoros. These authors mostly cover the career of Nikephoros from his role in the Battle of the Zygos Pass in 1053 to his death.