Characteristics and historyEdit
- TOS episodes: "Balance of Terror", "The Alternative Factor", "The Squire of Gothos"
- TOS episodes: "Metamorphosis", "Catspaw", "Obsession", "A Private Little War", "The Omega Glory", "Patterns of Force", "Friday's Child"
- VOY episodes: "The 37's", "One Small Step", "Once Upon a Time", "Blink of an Eye", "Rise"
- TNG episodes: "The Dauphin", "The Vengeance Factor", "The Inner Light", "A Fistful of Datas", "Time's Arrow"
- ENT episodes: "Terra Nova", "The Communicator"
- TOS movie: The Voyage Home
- TAS episode: "The Pirates of Orion"
- DS9 novel: Devil in the Sky
- TOS novels: Spock Must Die!, Spock, Messiah!, Devil World
- TOS novels: The Entropy Effect, Ishmael, The Kobayashi Maru, Home is the Hunter, Crossroad, Unspoken Truth
- TOS - Rihannsu novel: My Enemy, My Ally
- TOS comics: "We Are Dying, Egypt, Dying!", "The Last Word"
- TNG novels: Infiltrator, The Forgotten War
- DS9 - Invasion! novel: Time's Enemy
- ST references: Star Fleet Medical Reference Manual, Spaceflight Chronology
- ST novel: Excelsior: Forged in Fire
- FASA RPG module: The Four Years War
- ST - New Worlds, New Civilizations short story: "225 Years of Service"
- TLE - Terok Nor novel: Day of the Vipers
- VOY - Captain Proton: Defender of the Earth short story: "The Planets of the Future"
- TTN novels: Over a Torrent Sea, Synthesis
- ENT - The Romulan War novel: Beneath the Raptor's Wing
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