Jewanski, Jörg, Sean A. Day, Julia Simner, and Jamie Ward. “The Beginnings of an Interdisciplinary Study of Synaesthesia: Discussions about the Nussbaumer Brothers (1873)”. Theoria et Historia Scientiarum 10 (May 20, 2014): 149–176. Accessed July 3, 2025. https://apcz.umk.pl/THS/article/view/ths-2013-0008.