The classification of rock material in juxtaposition with the typology of the inscribed pedestals in Novae - Biernacki, Andrzej Bolesław (The Roman and late Roman city. The International Conference (Veliko Turnovo 26-30 July 2000). Rimskijat i kăsnoantičnijat grad. Meždunarodna Naučna Konferencija (Veliko Tărnovo 26-30 juli 2000)., 2002)