Over the Borders : "The Jaggeds", Mystery Edge-Modified Bone Tools as the New Witness of Long-Distance Contact in Northern and Central Europe from the Neolithic to the Iron Age. - Boguszewski, Andrzej (The sound of bones : proceedings of the 8th meeting of the ICAZ Worked Bone Reserarch Group in Salzburg, [August 29 - September 3], 2011, 2013)