Russian Murder Tamara Samsonova and the Mexican Murders Las Poquianchis

Tamara Samsonova - Wikipedia

The Granny Ripper - Tamara Samsonova • Morbidology

Tamara Samsonova: 'Granny Ripper' cannibal serial killer was 'inspired by Soviet-era mass-murderer known as the Vampire' - Irish Mirror Online

Police Discover “Killing Diary” Of Cannibalistic Grandmother Who Gobbled Up Fourteen Victims (talkmurder.com)

Delfina and María de Jesús González - Wikipedia

Delfina & Maria de Jesus Gonzalez | Murderpedia, the encyclopedia of murderers

The Killer Sisters Who Killed Over 90 People (anomalien.com)

Most Feared Serial Killer Sisters | Lessons from History (medium.com)

The Gonzalez Sisters. There are very few cases in history of… | by Michelle Karr | Medium