Pliny the Elder (21. mai 2015). «35, note 22». Pliny the Elder: The Natural History Book IV. ISBN978-1-4725-2101-9. Arkivert fra originalen 28. april 2017. Besøkt 4. september 2019. «Now Lisbon. Both Strabo, Solinus, and Martianus Capella make mention of a story that Ulysses came to Spain and founded this city.»
Pliny the Elder (21. mai 2015). «35, note 22». Pliny the Elder: The Natural History Book IV. ISBN978-1-4725-2101-9. Arkivert fra originalen 28. april 2017. Besøkt 4. september 2019. «Now Lisbon. Both Strabo, Solinus, and Martianus Capella make mention of a story that Ulysses came to Spain and founded this city.»