Authors retain the copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution 4.0 International Public License (CC-BY-4.0) that allows others to share the work with an acknowledgment of the work's authorship and initial publication.
Three lines by Ennius quoted by Ausonius (techn. 17-19), relevant for the question of authorial variant readings in antiquity, with particular reference to C. Di Giovine’s edition.