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Iwase, Akira; Hashizume, Jun; Izuho, Masami; Takahashi, Keiichi; Sato, Hiroyuki (March 2012). "Timing of Megafaunal Extinction in the Late Late Pleistocene on the Japanese Archipelago". Quaternary International. 255: 114–124. Bibcode:2012QuInt.255..114I. doi:10.1016/j.quaint.2011.03.029.