Bubnov, S. N.; Lebedev, V. A.; Chernyshev, I. V.; Sagatelyan, A. K.; Dokuchaev, A. Ya.; Gol’tsman, Yu. V.; Oleinikova, T. I.; Griboedova, I. G. (2014). "The potentially active Porak neovolcanic center (Lesser Caucasus, Armenia): The composition of lavas and melt sources". Doklady Earth Sciences. 459 (1): 1365–1370. doi:10.1134/S1028334X14110014. ISSN1028-334X.
Bubnov, S. N.; Lebedev, V. A.; Chernyshev, I. V.; Sagatelyan, A. K.; Dokuchaev, A. Ya.; Gol’tsman, Yu. V.; Oleinikova, T. I.; Griboedova, I. G. (2014). "The potentially active Porak neovolcanic center (Lesser Caucasus, Armenia): The composition of lavas and melt sources". Doklady Earth Sciences. 459 (1): 1365–1370. doi:10.1134/S1028334X14110014. ISSN1028-334X.