Canonical structural spine
The work's own structure
Reviewed edition: Leonine volume 47, Sententia libri Ethicorum, Rome 1969, as identified by Corpus Thomisticum. Division axes: book → lecture. 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.