https://digital.katalog.queersearch.org/s/katalog/item/39056, “Memoir: Celebrating 25 Years of the First LGBTI Orginazation (1897-1922): Translated by Michael Lombardi-Nash”, https://digital.katalog.queersearch.org/s/katalog/item/49217, QueerSearch, accessed 30. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/29654