An early medieval assemblage of iron artifacts from "Góra Słupsko" hillfort, site 2 at Kostkowice, Zawiercie district, Śląskie voivodeship - Rozmus, Dariusz (. Acta archaeologica Carpathica . - Cracoviae : Polish Acad. of Sciences Warsaw Printing House, 1958-. - ISSN 0001-5229 41, 2006)