Canonical structural spine
The work's own structure
Reviewed edition: Homer, Homeri Opera, vols. 1-2, ed. D. B. Monro and T. W. Allen, Oxford, 1908-1920. Division axes: book → line. Structural nodes alone do not assert commentary citations.
Record-local commentary evidence
Commentary citations: work locus ↔ Dante locus
These citations occur in later commentary. They do not, by themselves, mean Dante cited this work.