EDITIONS: in Bonn Corpus scriptorum hist. Byz., L. Schopen and I. Bekker, with life and list of works by J. Boivin (1829-55) ; J. P. Migne, Patrologia graeca, cxlviii., cxlix.; see also C. Krumbacher, Geschichte der byzantinischen Literatur (1897) ; R. Guilland, Essai sur Nicephore Gregoras (1926), with bibliography.