Canonical structural spine
The work's own structure
Reviewed edition: Orosius, Paulus. Historiarum adversum paganos libri VII (CSEL 5). Karl Zangemeister, editor. Vienna: Gerold, 1882. Division axes: book → chapter → 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.