Trehubov, K. et al. 2019. Features of the fortifications of the Bilsk settlement of the 7th and 4th centuries BC. Teka Komisji Architektury, Urbanistyki i Studiów Krajobrazowych. 15, 2 (Jun. 2019), 60–67. DOI:https://doi.org/10.35784/teka.984.