Hrouda, F., H. Siemes, N. Herres, and C. Hennig-Michaeli. “The Relationship Between the Magnetic Anisotropy and the C-Axis Fabric in a Massive Hematite Ore”. Journal of Geophysics, Vol. 56, no. 1, Dec. 1984, pp. 174-82, https://journal.geophysicsjournal.com/JofG/article/view/244.