Andrew Lintott, Violence in Republican Rome (Oxford University Press, 1999, 2nd ed.), p. 102 online.
John E. Stambaugh, The Ancient Roman City (Johns Hopkins University Press, 1988), p. 347, note 4 online and p. 348, note 13; O.F. Robinson, Ancient Rome: City Planning and Administration (Routledge, 1994), p. 105 online.
Andrew Lintott, The Constitution of the Roman Republic (Oxford University Press, 1999), pp. 12 and 95 online.
Jean Andreau, Banking and Business in the Roman World (Cambridge University Press, 1999), p. 115 online.
Rachel Feig Vishnia, State, Society, and Popular Leaders in Mid-Republican Rome, 241-167 B.C. (Routledge, 1996), p. 86ff. online.
Livy 33.42.1; Vishnia, State, Society, and Popular Leaders, p. 171; Fergus Millar, Rome, the Greek World, and the East (University of North Caroline Press, 2002), p. 122 online; Lintott, Constitution, p. 184.