Troebst, S. „Groueff, Stephane: The Crown of Thorns. The Reign of King Boris III of Bulgaria, 1918—1943“. Südost-Forschungen, Bd. 1, Nr. 1, November 2021, S. 419-20, https://www.suedost-forschungen.de/portal/index.php/sof/article/view/8828.