Okurka, T. “Wireless Telegraphy at the German Universal Exhibition in Ústí Nad Labem in 1903 [1]”. Acta Polytechnica 48, no. 3 (January 3, 2008). Accessed May 12, 2025. https://ojst.is.cvut.cz/ojs/index.php/ap/article/view/1005.