Altered States of consciousness during an extreme ritual
http://journals.plos.org/plosone/article?
Double Hanging During Consensual Sexual Asphyxia
id=10.1371%2Fjournal.pone.0153126http://www.dropbox.com/s/uvdlj0u8ncad0nw/Lee%2C%20Klement%2C%20%26%20Sagarin%20%282015%29.pdf?dl=0
Hormonal Changes and Couple Bonding in Consensual
Sadomasochistic Activity
Sadomasochism without sex? Exploring the parallels between BDSM and extreme rituals
https://http://www.dropbox.com/s/1jms45k5tknjixe/Sagarin%2C%20Lee%2C%20%26%20Klemet%20%282015%29.pdf