^J. Wills Burke - Origines: the streets of Vietnam : a historical companion 2001 "ĐINH CÔNG TRÁNG (1842 - 1887) Đinh Công Tráng was the leader of the royalist Cẩn Vưong (Serve the King)"
^Overturned Chariot: The Autobiography of Phan-Bôi-Châu 1999 - Page 60