Lebedev, V. A.; Chernyshev, I. V.; Shatagin, K. N.; Bubnov, S. N.; Yakushev, A. I. (2013). "The quaternary volcanic rocks of the Gegham highland, Lesser Caucasus, Armenia: Geochronology, isotopic Sr-Nd characteristics, and origin". Journal of Volcanology and Seismology. 7 (3): 204–229. doi:10.1134/S0742046313030044. ISSN0742-0463. S2CID130603559.
Chataigner, C.; Gratuze, B. (2014). "New Data on the Exploitation of Obsidian in the Southern Caucasus (Armenia, Georgia) and Eastern Turkey, Part 1: Source Characterization". Archaeometry. 56 (1): 25–47. doi:10.1111/arcm.12006. ISSN0003-813X.
Lebedev, V. A.; Chernyshev, I. V.; Shatagin, K. N.; Bubnov, S. N.; Yakushev, A. I. (2013). "The quaternary volcanic rocks of the Gegham highland, Lesser Caucasus, Armenia: Geochronology, isotopic Sr-Nd characteristics, and origin". Journal of Volcanology and Seismology. 7 (3): 204–229. doi:10.1134/S0742046313030044. ISSN0742-0463. S2CID130603559.
Lebedev, V. A.; Chernyshev, I. V.; Shatagin, K. N.; Bubnov, S. N.; Yakushev, A. I. (2013). "The quaternary volcanic rocks of the Gegham highland, Lesser Caucasus, Armenia: Geochronology, isotopic Sr-Nd characteristics, and origin". Journal of Volcanology and Seismology. 7 (3): 204–229. doi:10.1134/S0742046313030044. ISSN0742-0463. S2CID130603559.
Chataigner, C.; Gratuze, B. (2014). "New Data on the Exploitation of Obsidian in the Southern Caucasus (Armenia, Georgia) and Eastern Turkey, Part 1: Source Characterization". Archaeometry. 56 (1): 25–47. doi:10.1111/arcm.12006. ISSN0003-813X.