The Korness system, located in the Outer Rim territories, was home to the planet of Gellefon.
- " The New Republic Campaign: Preparing to Move Beyond the Movies " — Polyhedron 86 (Unlicensed)
- The Essential Atlas (referred to it as the Gellefon system)
- Star Wars: The Essential Atlas Online Companion on StarWars.com (article) (backup link) (referred to it as the Gellefon system)