Second VarSITI General Symposium (VarSITI-2017) was held with the financial support of the Russian Foundation for Basic Research, Project No. 17-05-20306.
Bondar', Elena, <span lang="EN-US">Shafer Institute of Cosmophysical Research and Aeronomy, SB RAS</span><span lang="HR">, Yakutsk</span>, Russian Federation
