@article{PA20140565.pdf, <br>author="Ekaterina V. Doronicheva and M. Steven Shackley",<br>title="Obsidian Exploitation Strategies in the Middle and Upper Paleolithic of the Northern Caucasus: New Data from Mesmaiskaya Cave",<br>journal="PaleoAnthropology",<br>year="2014",<br>volume="2014",<br>pages="565-585"<br>}