See:
- Gaius Julius Caesar, Commentarius De Bello Hispaniensi, 1–42. -http://www.forumromanum.org/literature/caesar/hispe.html
- Appian, Roman Civil Wars, II: 103–105 - http://penelope.uchicago.edu/Thayer/e/roman/texts/appian/civil_wars/2*.html
- Cassius Dio. Roman History. XLVII: 28–42 - http://penelope.uchicago.edu/Thayer/E/Roman/Texts/Cassius_Dio/47*.html