Canonical structural spine
The work's own structure
Reviewed edition: Homer, The Odyssey, vols. 1-2, ed. A. T. Murray, London/New York, 1919. 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.