scientific article (publication date: 23 August 2007)
author: Ryu Uemura, Kenji Kawamura, Shuji Fujita, Jean Jouzel, Kumiko Goto-Azuma, Jeffrey P. Severinghaus, Lorraine Lisiecki, Frédéric Parrenin, Okitsugu Watanabe, Takakiyo Nakazawa, Françoise Vimeux
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