«April». Dictionary.com Unabridged. Randomhouse Inc. Ανακτήθηκε στις 9 Ιανουαρίου 2018.
«May». Dictionary.com Unabridged. Randomhouse Inc. Ανακτήθηκε στις 9 Ιανουαρίου 2018.
livius.org
47.13 and 47.14: "[47.13] In the five hundred and ninety-eighth year after the founding of the city, the consuls began to enter upon their office on 1January. [47.14] The cause of this change in the date of the elections was a rebellion in Hispania."