https://digital.katalog.queersearch.org/s/katalog/item/63754, “Die Entdeckung der Psychosomatik: Ernst Simmels psychoanalytische Klinik in Berlin-Tegel”, https://digital.katalog.queersearch.org/s/katalog/item/49445, QueerSearch, accessed 16. Juni 2025, https://digital.katalog.queersearch.org/s/katalog/item/55948