Shcherbyna, S.V., Feshchenko A.І., Yu.V. Lisovyi, O.P. Ivashchenko, Adamenko О.V., and Yu.P. Soroka. 2021. “Сomplex Approach to Certification and Metrological Estimation the State of Digital Seismometric Registrators”. Geofizicheskiy Zhurnal 43 (2):201-17. https://doi.org/10.24028/gzh.v43i2.230200.