Rudenko, K.A. “CONCEPTS OF BULGARIAN ETHNOGENESIS IN THE SECOND HALF OF THE 20th – THE BEGINNING OF THE 21st CENTURY (to the 85th Anniversary of E. Kazakov)”. THEORY AND PRACTICE OF ARCHAEOLOGICAL RESEARCH 28, no. 4 (December 26, 2019): 189-202. Accessed December 22, 2025. https://journal.asu.ru/tpai/article/view/%2828%29.-14.