See:
- Judith Thomalsky, Bakhtiyar Jalilov, Courcier Antoine, Large Blade Technologies in the Southern Caucasus and in Northern Mesopotamia in the 6th-4thmillennium BC, Subartu XXXVIII, At the Northern Frontier of Near Eastern Archaeology, Brussels 2017
- https://web.archive.org/web/20130213154411/http://www.groh.ru/gro/chem/chemhist.html