Denskat, K.U., H.J. Beinroth, and F.M. Neubauer. 1983. “Interplanetary Magnetic Field Power Spectra With Frequencies from 2.4 X 10^-5 Hz to 470 Hz from HELIOS-Observations During Solar Minimum Conditions”. Journal of Geophysics 54 (1), 60-67. https://journal.geophysicsjournal.com/JofG/article/view/70.