see:
- http://tayproject.org/TAYmaster.fm$Retrieve?YerlesmeNo=1380&html=masterEngDetail.html&layout=web
- Tristan Carter and and Marina Milic, The consumption of obsidian at Neolithic Çatalhöyük in: Stone Tools in Transition: From Hunter-Gatherers to Farming Societies in the Near East. 7th Conference on PPN Chipped and Ground Stone Industries,Servei de Publicacions de la Universitat Autònoma de Barcelona 2014,pp. 495-506 - https://www.academia.edu/5389781