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Challenges for coring deep permafrost on Earth and Mars.
Pfiffner SM, Onstott TC, Ruskeeniemi T, Talikka M, Bakermans C, McGown D, Chan E, Johnson A, Phelps TJ, Le Puil M, Difurio SA, Pratt LM, Stotler R, Frape S, Telling J, Lollar BS, Neill I, Zerbin B. Pfiffner SM, et al. Among authors: neill i. Astrobiology. 2008 Jun;8(3):623-38. doi: 10.1089/ast.2007.0159. Astrobiology. 2008. PMID: 18680412