These are the sources I used when compiling this episode on the Blood Countess, Elizabeth Bathory:

https://www.history.com/this-day-in-history/bathorys-torturous-escapades-are-exposed
https://www.biography.com/crime-figure/elizabeth-bathory
https://www.britannica.com/biography/Elizabeth-Bathory
https://www.historyhit.com/the-blood-countess-facts-about-elizabeth-bathory/
https://www.historytoday.com/archive/months-past/death-countess-elizabeth-bathory
https://www.rejectedprincesses.com/princesses/elisabeth-bathory
https://en.wikipedia.org/wiki/Elizabeth_B%C3%A1thory