The Struma/Strymon River Valley in prehistory. Proceedings of the International Symposium Strymon Praehistoricus, Kjustendil-Blagoevgrad (Bulgaria), Serres-Amphipolis (Greece), 27.09.-01.10.2004. - Todorova, Chenrieta 1933-2015; Ivanov, Georgi; Stefanovich, Mark (Bulged, 2007)