Canonical structural spine
The work's own structure
Reviewed edition: Horace. Odes and Epodes. Shorey, Paul, editor; Laing, Gordon Jennings, joint editor. Chicago: B.H. Sanborn and Company, 1919. Division axes: book → poem → 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.