Ciesielska, Danuta. “Fellows of the Academy of Arts and Sciences in Kraków and the Jagiellonian University in Georg-August Univeristy in Göttingen in the Period 1891–1914. Mathematics”. Studia Historiae Scientiarum 19 (September 30, 2020): 375–422. Accessed May 12, 2021. https://ojs.ejournals.eu/SHS/article/view/7356.