Proceedings of the National Academy of Sciences of the United States of America
Work published in May 2018 in the Proceedings of the National Academy of Sciences of the United States of America journal by the research team from the Northumbria University revealed that the locality "Crveni Tepih" shows the evidence of the oldest lead pollution in Europe. It is dated to 3600 BC, predating the previous oldest findings dated to 3000 BC in southern Spain and pushed back the origins of lead metallurgy for six centuries.