https://digital.katalog.queersearch.org/s/katalog/item/64624, https://digital.katalog.queersearch.org/s/katalog/item/64627, and https://digital.katalog.queersearch.org/s/katalog/item/65889, “On the Prevalence and Roles of Females in the Sadomasochistic Subculture: Report of an Empirical Study”, QueerSearch, accessed 3. Juli 2025, https://digital.katalog.queersearch.org/s/katalog/item/59369