R. Joy Littlewood, A Commentary on Ovid: Fasti Book 6 (Oxford University Press, 2006), p. 73; T.P. Wiseman, Remus: A Roman Myth (Cambridge University Press, 1995), p. 61 online.
Joseph Rykwert, The Idea of a Town: The Anthropology of Urban Form in Rome, Italy, and the Ancient World (MIT Press, 1988), pp. 101 and 159 online.
English translation by R.W. Dyson, Augustine: The City of God against the Pagans (Cambridge University Press, 1998, 2002), p. 292 online.
Martin Henig, Religion in Roman Britain (London: BT Batsford LTD, 1984), pp. 185–186 online, with image of example.
Daniel Ogden, Magic, Witchcraft, and Ghosts in the Greek and Roman Worlds: A Sourcebook (Oxford University Press, 2002), p. 225 online.
