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.
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.