Westphal, M., J-B. Edel, M. Kadzialko-Hofmokl, M. Jelenska, and A. Grocholski. “Paleomagnetic Study of Upper Carboniferous Volcanics from Sudetes (Poland)”. Journal of Geophysics 61, no. 1 (April 23, 1987): 90-96. Accessed September 17, 2025. https://journal.geophysicsjournal.com/JofG/article/view/125.