Lebedev, V. A.; Chernyshev, I. V.; Yakushev, A. I. (2011). "Initial time and duration of quaternary magmatism in the Aragats neovolcanic area (Lesser Caucasus, Armenia)". Doklady Earth Sciences. 437 (2): 532–536. doi:10.1134/S1028334X11040209. ISSN1028-334X.
Lebedev, V. A.; Chernyshev, I. V.; Yakushev, A. I. (2011). "Initial time and duration of quaternary magmatism in the Aragats neovolcanic area (Lesser Caucasus, Armenia)". Doklady Earth Sciences. 437 (2): 532–536. doi:10.1134/S1028334X11040209. ISSN1028-334X.