https://digital.katalog.queersearch.org/s/katalog/item/40426, “Forschungen über das Räthsel der mannmännlichen Liebe: I. Vindex - II. Inclusa - III. Vindicta - IV. Formatrix - V. Ara spei”, https://digital.katalog.queersearch.org/s/katalog/item/40631, QueerSearch, accessed 29. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/17706