Schlittenhardt, J. “Investigation of the Velocity- and Q-Structure of the Lowermost Mantle Using PcP/P Amplitude Ratios from Arrays at Distances of 70°-84°”. Journal of Geophysics 60, no. 1 (October 30, 1986): 1-18. Accessed September 18, 2025. https://journal.geophysicsjournal.com/JofG/article/view/215.