“Ether, the old quantum theory, philosophy of nature and the problem of continuity as defined by Bogdan Szyszkowski: Contribution to research on the reception of the old quantum theory and quantum mechanics in Poland before 1953”, ZFN, no. 68, pp. 185–216, Sep. 2020, Accessed: Oct. 09, 2025. [Online]. Available: https://www.zfn.edu.pl/index.php/zfn/article/view/498