SENGALEVICH, G. the Bulgarian group of sgraffito ceramics with underglaze monograms: characteristics and problems. Contributions to Bulgarian Archaeology | Приноси към българската археология, [S. l.], v. 10, p. 185–208, 2020. Disponível em: https://publications.naim.bg/index.php/CBA/article/view/261. Acesso em: 7 oct. 2026.