Theißen, Ulrich. 2006. “‘An Enchanting Herb for Coughs’: On the Designations for Alants ((Inula Helenium L.) in Slavic Languages, Especially in Bulgarian”. Zeitschrift für Balkanologie 42 (1 + 2). https://www.zeitschrift-fuer-balkanologie.de/index.php/zfb/article/view/84.