Early Byzantine glass from Caričin Grad/Iustiniana Prima (Serbia): first results concerning the composition of raw glass chunks - Drauschke, Jörg (Glass along the Silk Road from 200 BC to AD 1000. International conference within the scope of the "Sino-German Project on Cultural Heritage Preservation" of the RGZM and the Shaanxi Provincial Institute of Archaeology, December 11th-12th 2008., 2010)