136–142. ^ Sheppard Frere(英語版), Britannia: A History of Roman Britain, third edition, 1987, p. 330 ^ Frere, Britannia p. 331 ^ Panegyrici Latini 8:12–19;
originally published in 1967 ^ a b c d Hargis, Toni Summers (2006) Rules, Britannia: An Insider's Guide to Life in the United Kingdom St. Martin's Press,