| ref | joined_books |
|---|---|
| Oppius C., Vitae, 1 | Ker and Wessels (2020), The Values of Nighttime in Classical Antiquity: Between Dusk and Dawn, 266 |
| Oppius C., Vitae, 2 | Ker and Wessels (2020), The Values of Nighttime in Classical Antiquity: Between Dusk and Dawn, 266 |