Ransohoff, Jake, ??? . 2013. Ivan {\v S}i{\v s}man and the Ottoman Conquest of Bulgaria (1371?1395): A Reconsideration. Palaeobulgarica / ????????????????? 37. (Palaeobulgarica / ?????????????????). 89?100.

Ransohoff, Jake, ??? . 2011. The Relationship Between Land and Power in Terterid Bulgaria: a Comparative Study of the Appanages of Eltimir and Smilets. Palaeobulgarica / ????????????????? 35. (Palaeobulgarica / ?????????????????). 37?47.