The Ringali Shell was an area along the Perlemian Trade Route as it passed through the Bormea and Darpa sectors, with the Ringali Nebula wrapping around it. It consisted of six highly-populated systems that, in order, connected the planets of Corulag, Chandrila, Brentaal, Esseles, Rhinnal, and Ralltiir.
- "Into the Core Worlds" – Star Wars Adventure Journal 7
- The Far Orbit Project
- Star Wars Encyclopedia
- Coruscant and the Core Worlds
- The Complete Star Wars Encyclopedia
- The Essential Atlas
- Strongholds of Resistance