Ohira, Akio. “Holocene Sea-Level Changes and Evolution of the Lower Tokachi River Plain, Hokkaido, Japan”. Geografia Fisica e Dinamica Quaternaria 6 (January 1, 2003): 71–84. Accessed April 29, 2026. https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/1257.