Razkopkite v Sliven i Karnobat i problemăt za prehoda ot antičnostta kăm srednovekovieto. The excavations in the towns of Silven and Karnobat and the problem of transition from Antiquity to Midddle Ages - Shtereva, Irina (Godišnik na Departament Archeologija, 4/5 (2000), 2000)