D.R. Bridgland, and D. Maddy. “Global Correlation of Long Quaternary Fluvial Sequences: A Review of Baseline Knowledge and Possible Methods and Criteria for Establishing a Database”. Netherlands Journal of Geosciences 81 (December 1, 2002): 265-281. Accessed March 29, 2026. https://njgjournal.nl/index.php/njg/article/view/11400.