BUDJA, Mihael. Seals, contracts and tokens in the Balkans Early Neolithic: where in the puzzle. Documenta Praehistorica, Ljubljana, SI, v. 30, p. 115–130, 2003. DOI: 10.4312/dp.30.6. Disponível em: https://journals.uni-lj.si/DocumentaPraehistorica/article/view/30.6.. Acesso em: 20 jul. 2024.