Canonical structural spine
The work's own structure
Reviewed edition: Composite structural source: J. P. Migne, Patrologia Latina 77 (Paris, 1849), books I/III/IV; Patrologia Latina 66 (Paris, 1847), book II. Corpus Corporum transcriptions (2019; book II structure corrected 2023). Division axes: book. 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.