Canonical structural spine
The work's own structure
Reviewed edition: Platonis Opera, Tomus II: Tetralogia III-IV. Burnet, John, editor. Oxford: Clarendon Press, 1910. Division axes: page → section. 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.