Khomiakova, Olga, et al. “Hillforts of the Central Nadruvians: A Case Study of Settlement Patterns and Social Organization in Former East Prussia in the First Half of the 1st Millennium AD”. Archaeologia Lituana, vol. 19, Dec. 2018, pp. 78-99, https://doi.org/10.15388/ArchLit.2018.19.5.