https://digital.katalog.queersearch.org/s/katalog/item/44332, “Zur Geschichte des bayerischen Haberfeld-Treibens”, https://digital.katalog.queersearch.org/s/katalog/item/47984, QueerSearch, accessed 30. April 2025, https://digital.katalog.queersearch.org/s/katalog/item/55930