↑ Ronald Syme, The Roman Revolution (Oxford University Press, 1939, reprinted 2002), p. 57 online; Elizabeth Rawson, "Caesar: Civil War and Dictatorship," in The Cambridge Ancient History: The Last Age of the Roman Republic 146–43 BC (Cambridge University Press, 1994), vol. 9, p. 465.
Chisholm, Hugh, ed. (1911). "Cassius". Encyclopædia Britannica (11th ed.). Cambridge University Press.
