[1]
K. Marinow, “Wild, Haughty and Menacing Highlanders: Bulgarians and Mountains in the Context of Byzantine-Bulgarian Armed Conflicts”, in The Bulgarian State in 927-969. The Epoch of Tsar Peter I: No. XXXIV, M. J. Leszka, Ed. Poland: Lodz University Press, 2018, pp. 287–301. doi: 10.18778/8142-115-7.16.