The infamous Reginald Barkbone, a pirate from Poss'Nomin, was known as the Scourge of the Seven Sectors in the Imperial Period. Rufaan Tigellinus, a Grand Admiral assigned to capture Barkbone, was ignorant of the specific location of these seven sectors.
- The New Essential Guide to Droids (Initial mention)
- Endnotes for The New Essential Guide to Droids: PART 3 OF 3 on Continuity, Criticisms, and Captain Panaka — Daniel Wallace's StarWars.com Blog (the original website no longer exists)
- Underworld Appendix: Swoops, Spice, and Wretched Rogues on Hyperspace (article) (its content is outdated, and a backup link cannot be found)
- The Complete Star Wars Encyclopedia , Volume I ("Barkbone, Reginald")
- The Bounty Hunter Code: From the Files of Boba Fett