@misc{Sikora_Jerzy_From_2015, author={Sikora, Jerzy and Kittel, Piotr and Wroniecki, Piotr}, volume={53}, copyright={Creative Commons Attribution BY-SA 3.0 PL license}, address={Warszawa}, journal={Archaeologia Polona}, howpublished={online}, year={2015}, publisher={Institute of Archaeology and Ethnology Polish Academy of Sciences}, language={eng}, type={Text}, title={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}, URL={http://www.rcin.org.pl/iae/Content/87017/PDF/WA308_92347_P357_From-a-point-on.pdf}, keywords={magnetometry, surface survey, phosphate, electrical resistivity, aerial photography, Middle Ages}, }