[Olissipona] A Cronologia do Circo de Olisipo by IPPAR (now IGESPAR); published as: Revista Portuguesa de Arqueologia. volume 5. número 2. 2002, pp 245–275, "A Cronologia do Circo de Olisipo: a Terra Sigillata", Eurico Sepúlveda and others.
Gibbon, Edward (1776). "Chapter 31 - Games and spectacles". The History of the Decline and Fall of the Roman Empire. Christian Classics Ethereal library; Edward Gibbon, English historian of the Roman Empire. Consultado o 2013-11-11.
- second sentence of the following paragraph
[Olissipona] A Cronologia do Circo de Olisipo by IPPAR (now IGESPAR); published as: Revista Portuguesa de Arqueologia. volume 5. número 2. 2002, pp 245–275, "A Cronologia do Circo de Olisipo: a Terra Sigillata", Eurico Sepúlveda and others.