Sources
(1) Dictionary of Greek and Roman Biography and Mythology, vol. II, p. 1127 (« Mussidia Gens »).
(2) Wiseman, « Some Republican Senators and Their Tribes », p. 127.
(3) Chase, pp. 121, 122.
(4) Chase, p. 110.
(5) The New College Latin & English Dictionary, s. v. Optatus.
(6) Chase, p. 145.