Pristavova, Stefka, Tsveta Stanimirova, and Valeri Grigorov. “Минералого-петрографско изследване на керамиката от обект 5 до с. Драговищица, община Костинброд: Mineralogical and Petrographic Analysis of the Pottery from Site 5 Near the Village of Dravovishtitsa, Konstinbrod Municipality”. Bulgarian e-Journal of Archaeology | Българско е-Списание за Археология 6, no. 1 (June 6, 2016): 91–108. Accessed June 30, 2022. https://be-ja.org/index.php/journal/article/view/be-ja-6-1-2016-91-108.