Sikora, Jerzy, Piotr Kittel, and Piotr Wroniecki. 2015. “From a Point on the Map to a Shape in the Landscape. Non-Invasive Verification of Medieval Ring-Forts in Central Poland: Rozprza Case Study”. Archaeologia Polona 53 (January):510-14. https://journals.iaepan.pl/apolona/article/view/388.