Columbia subject headings:
Tornikēs, Dēmētrios, -1200.
Tornikēs, Geōrgios, active 12th century.
Harvard subject headings:
Byzantine Empire--History--Sources.
Princeton subject headings:
Byzantine Empire--History--1081-1453--Sources.
Church history--12th century--Sources.
Greek letters.
Orthodox Eastern Church--Byzantine Empire--History--Sources.