The following sources were consulted in the preparation of the article “12 mysterious figures who still puzzle historians.”
- Just Who Was the Outlaw Queen Etta Place?
- Israel’s National Library to display notebooks of mysterious scholar who taught Elie Wiesel, Emmanuel Levinas
- Texarkana Phantom Moonlight Murders
- The Kingsbury Run Murders aka “The Torso Murders”
- The Villisca Axe Murders: A Review Essay
- Tiananmen Square ‘Tank Man’: 30 years later, his memory lives on
- A lonely Sligo death still shrouded in mystery
- Monthly Mystery: Who put ‘Bella’ in the wych elm?
- What Happened to “America’s Stonehenge”?
- The Myth of Agent 355, the Woman Spy Who Supposedly Helped Win the Revolutionary War