The 'Dykyi Sad' fortified settlement as a uniting link in the context of economic, political and cultural relation of 1200-1000 BC (the Baltic shore, the Pontic region and the mediterranean) - Gorbenko, Kirill V. (Routes between the seas : Baltic-Bug-Boh-Pont from the 3rd to the middle of the 1st millenium BC., 2009)