1. Pre-historic times, as illustrated by ancient remains, and the manners and customs of modern savages;Lubbock,1865
2. C. J. Thomsen, 1836, Ledetraad til Nordisk Oldkyndighed. English translation: Guide to Northern Antiquity by Francis Egerton Ellesmere (Denmark), BiblioBazaar, 2015.
3. The Ancient Stone Implements, Weapons and Ornaments of Great Britain;Evans,1897
4. The Iron Age in Guilan: Proposal for a chronology;Haerinck,1988
5. Hiroshima University Archaeological Mission (ed). Sogen no Michi (in Japanese), Vol. 43-47, 1973, Akishobo.