Ronald Syme, The Roman Revolution (Oxford University Press, 1939, reissued 2002), pp. 70–71 online and 355.
The other two are Quintus Cicero and Titus Labienus; Myles Anthony McDonnell, Roman manliness: virtus and the Roman Republic (Cambridge University Press, 2006), p. 308 online.
John R. King, The Fourteen Philippic Orations of Marcus Tullius Cicero (Oxford, 1878), p. 262 online.
Orelli conjectured that the passage should read alii praetorem, tribunum Volusienum, ego. "It has been assumed that this man is C. Volusenus Quadratus … but this is mere guessing," notes George Long, M. Tullii Ciceronis orationes (London, 1858), vol. 4, p. 704 online.
John Richard King, The Philippic Orations of Marcus Tullius Cicero (Oxford: Clarendon Press, 1878, 2nd ed.), p. 336 online.
