Zharkova, V., Popova, E., Shepherd, S., & Zharkov, S. (2018). Reply to comment on the paper “ on a role of quadruple component of magnetic field in defining solar activity in grand cycles” by Usoskin (2017). Journal of Atmospheric and Solar-Terrestrial Physics, 176, 72-82. https://doi.org/10.1016/j.jastp.2017.09.019