Sumaruk, Yu. P., L. M. Yankiv-Vitkovska, and B. B. Dzuman. 2019. “Modeling of Regional Magnetic Field Applying Spherical Functions: Practical Aspect”. Geofizicheskiy Zhurnal 41 (6):165-72. https://doi.org/10.24028/gzh.0203-3100.v41i6.2019.190073.