Collette, B.J., J. Verhoef, and A.F.J. de Mulder. “Gravity and a Model of the Median Valley”. Journal of Geophysics 47, no. 1 (January 24, 1980): 91-98. Accessed September 15, 2025. https://journal.geophysicsjournal.com/JofG/article/view/106.