https://digital.katalog.queersearch.org/s/katalog/item/40303, “Beefcake: The Muscle Magazines of America 1950-1970”, https://digital.katalog.queersearch.org/s/katalog/item/47087, QueerSearch, accessed 30. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/19922