A. Ohira, “Holocene sea-level changes and evolution of the lower Tokachi River plain, Hokkaido, Japan”, Geog. Fis. Dinam. Quat., vol. 6, pp. 71–84, Jan. 2003, Accessed: Apr. 29, 2026. [Online]. Available: https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/1257