Mykolenko, D. 2020 Oct 14. How did Ferdinand I of Saxe-Coburg‑Gotha become Frenchman?. Universum Historiae et Archeologiae = The Universe of History and Archeology = Універсум історії та археології = Универсум истории и археологии ISSN 2664-9950 (Print) ISSN 2707-6385 (Online). [Online] 2:2