MUSIN, A. 2022. Lead and power: small lead seals of the Rurik and the Piast dynasties in central and eastern Europe. Slavia Antiqua. Rocznik poświęcony starożytnościom słowiańskim. 63 (Oct. 2022), 199–258. DOI:https://doi.org/10.14746/sa.2022.63.7.