| The woo is out there|
|Aliens did it...|
|... and ran away|
Generally considered at the time to have been Soviet test rockets or missiles, the opening of Soviet records reveals that was unlikely, so, the conspiracy-inclined assumed it had to be alien craft.
- Ghostrockets.se, where you can buy a documentary
- Jose Antonio Caravaca, "Spökraketer: Los cohetes fantasmas de Suecia" ("Spökraketer: The ghost rockets of Sweden"), blog entry, in Esos misterios objetos celestes y sus tripulantes ("Those mysterious celestial objects and their crew"), accessed June 25, 2019 (in Spanish).
- "Spökraketerna" (The ghost rockets"), SVT (Swedish Public Broadcasting), February 29, 2016. Accessed June 25, 2019 (in Swedish).