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3. Sargsyan, H.V., Gasparyan, V.R., & Mkrtchyan, A.T. (2004). [Spitak-III earthquake on October 25, 1998 with M=3.9, I0=5–6 (Armenia) Zemletriaseniia Severnoi Evrazii v 1998 godu [Earthquakes in Northern Eurasia, 1998] (pp. 249–252). Obninsk, Russia: GS RAS Publ. (In Russ.).
4. Sargsyan, H.V., Mkhitaryan, K.A., Sargsyan, L.S., & Suvaryan, A.G. (2008). Spitak-IV earthquake on February 4, 2002 with М=4.0, I0=6 (Armenia). Zemletriaseniia Severnoi Evrazii, 2002 [Earthquakes in Northern Eurasia, 2002] (pp. 323–330). Obninsk, Russia: GS RAS Publ. (In Russ.).
5. International Seismological Centre (2020), On-line Bulletin, https://doi.org/10.31905/D808B830